| 1. |
- Karlsson, Linn, 1974-
(författare)
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Chronic Pain and Exercise : Studies on pain intensity, biochemistry, adherence and attitudes
- 2017
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Chronic pain is common in western countries and entails considerable consequences for the afflicted individuals as well as for the society. Furthermore, chronic pain is complex including an advanced interplay between biological-, psychological- and social aspects. Treatment of chronic pain attempts to decrease pain intensity and increase physical-, psychological- and social functioning. However, the treatment of chronic pain is still not optimized. Different types of physical activity and exercise (PA&E) are commonly applied as non-pharmacological treatment strategies for chronic pain, but the most efficient type and dose of PA&E are unclear. In addition, adherence to prescribed PA&E is often troublesome, which further complicates the application of PA&E as treatment for chronic pain.The aim of this thesis is to increase the knowledge about PA&E as treatment for chronic pain regarding pain intensity, biochemical substances, adherence and attitudes.The findings of this thesis were that a long-term, home-based PA&E intervention comprising strength exercises as well as stretch exercises decreased pain intensity and increased function in women with chronic neck- and shoulder pain. Using microdialysis technique, differences in pain modulatory biochemical substances were found, before the intervention, in painful trapezius muscle compared to pain-free trapezius muscle. In addition, alterations in pain modulatory substances in painful trapezius muscle after the intervention were found, which possibly could imply peripheral physiological effects of PA&E. Furthermore, psychological factors could be associated to the effects of and adherence to the PA&E intervention. An intention to be physically active were expressed by patients with chronic pain, but a discordance between the intention and PA&E-behaviour were evident, even though the PA&E were experienced as valuable.In conclusion, this thesis strengthens the importance of PA&E as treatment for chronic pain. Especially, this thesis increases the knowledge about; possible peripheral pain inhibitory effects after long-term exercise; how psychological factors might affect the results of PA&E; and also about important behavioural aspects that might affect adherence to prescribed PA&E. This thesis highlights the need of more research on physiological pain inhibitory effects of long-term PA&E in chronic pain. Furthermore, improved methods for ensured adherence to prescribed PA&E are necessary in order to optimize the effect of PA&E as treatment for chronic pain.
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| 2. |
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| 3. |
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| 4. |
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| 5. |
- Andersson, Sara, et al.
(författare)
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Rehabilitering
- 2007
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Ingår i: Nordisk lärobok i audiologi. - Bromma : C. A. Tegnér AB. - 9789163194405 ; , s. 325-389
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Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
- Sjukdomstillstånd och skador i organ och vävnader orsakar diverse funktionella avvikelser, som i sin tur ger upphov till symptom, som personen ifråga kan iaktta och lida av. Dessa orsakar funktionsnedsättningar, som påverkar individens möjligheter att fungera och klara sig i sin dagliga miljö hemma, i olika arbetssituationer och i olika sociala sammanhang.
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| 6. |
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| 7. |
- Antepohl, Wolfram, 1968-, et al.
(författare)
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Cognitive impairment in patients with chronic whiplash-associated disorder - A matched control study
- 2003
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Ingår i: NeuroRehabilitation (Reading, MA). - 1053-8135 .- 1878-6448. ; 18:4, s. 307-315
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Tidskriftsartikel (refereegranskat)abstract
- Aim: To verify the occurrence of cognitive impairment in patients with chronic whiplash-associated disorder (WAD) and to provide a more detailed description of the impairment's character and context. Methods: Thirty (30) patients with chronic WAD and 30 matched healthy controls completed a cognitive test battery. Four computerised tests were used: a) two different types of cognitive tasks (reaction time vs. working memory) and b) two types of information processing (verbal vs. spatial). Before testing and after every randomised subtest, subjects rated their pain level on a visual analogue scale. Results: A worse overall performance among patients with WAD and, specifically, worse results concerning working memory tasks were found. Post-hoc testing revealed a statistically significant difference concerning the single variable "verbal reaction time". Pain intensity among patients increased significantly during testing. Pain intensity after the subtest for verbal mental reaction time (independent of test sequence) was significantly correlated with results in this subtest, the more pain, the more time was needed. Conclusion: Compared to healthy controls, patients performed worse overall. Concerning verbal reaction time, the impairment was correlated with pain intensity. The findings support the hypothesis that pain might be one important factor leading to cognitive impairment in patients with chronic WAD.
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| 8. |
- Bager, Johan-Emil, et al.
(författare)
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Acute blood pressure levels and long-term outcome in ischemic stroke.
- 2018
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Ingår i: Brain and behavior. - : Wiley. - 2162-3279. ; 8:6
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Tidskriftsartikel (refereegranskat)abstract
- Elevated blood pressure (BP) is common in acute ischemic stroke, but its effect on outcome is not fully understood. We aimed to investigate the association of baseline BP and BP change within the first day after stroke with stroke severity, functional outcome, and mortality.Patients admitted to hospital with acute ischemic stroke (IS) from 15 February 2005 through 31 May 2009 were consecutively included. Acute stroke severity and functional outcome at three and twelve months were investigated using multivariate regression analysis; the association between BP and all-cause mortality at one, three, and twelve was investigated by Cox proportional hazard regression and Kaplan-Meier survival curves.A total of 799 patients (mean age 78.4±8.0, 48% men) were included. Higher decreases in systolic and mean arterial blood pressure (ΔSBP and ΔMAP) were associated with decreased 1-month mortality (ΔSBP: hazard ratio, HR: 0.981; 95% CI: 0.968 - 0.994; p=.005), 3-month mortality (ΔSBP: HR 0.989; 95% CI 0.981 - 0.998; p-value .014), and twelve-month mortality (ΔSBP: HR 0.989; 95% CI 0.982 - 0.996; p-value .003). Stroke severity was associated with ΔMAP (B coefficient -.46, p-value .011). Higher SBP and MAP on admission were associated with better functional outcome at three (SBP: OR 0.987; 95% CI 0.978 - 0.997; p-value .008 - MAP: OR 0.985; 95% CI 0.971 - 1; p-value .046) and twelve (SBP: OR 0.988; 95% CI 0.979 - 0.998; p-value .015 - MAP: OR 0.983; 95% CI 0.968 - 0.997; p-value .02) months.In this elderly population, higher BP on arrival to the emergency room (ER) and decrease in BP after the patients' arrival to the ward were associated with improved functional outcome and reduced mortality, respectively. These results may reflect a regulatory situation in which elevated initial blood pressure indicates adequate response to cerebral tissue ischemia while subsequent blood pressure decrease instead may be a consequence of partial, successful reperfusion.
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| 9. |
- Bendelin, Nina, 1980-
(författare)
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Internet-Delivered Acceptance and Commitment Therapy for Chronic Pain : Feasibility, patients’ experiences and implementation process
- 2023
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Chronic pain represents a major burden for individuals and society. Internet-delivered psychological interventions are evidence-based treatments that enable patients to access qualified care at a time and place convenient for them. Internet-delivered Acceptance and commitment therapy (IACT) has shown promising treatment effects for chronic pain patients on pain-related outcomes such as disability, pain intensity, and interference, and on psychological outcomes such as catastrophizing, fear-avoidance and acceptance. Interdisciplinary pain rehabilitation programs (IPRP) are multimodal interventions given by synchronized teams of health care professionals from different disciplines. With moderate treatment effects on many outcomes, IPRP is the best evidence treatment for chronic pain to date. IACT may add to IPRP’s effectiveness by providing individual psychological treatment via the internet. However, IACT has not yet been implemented in routine care in a larger scale. In this thesis, the aim was to study if IACT may be acceptable for chronic pain patients and if it is feasible and effective as an addition to IPRP. Three methodological approaches were used: qualitative analysis, implementation science and a controlled trial of effectiveness in a clinical context. Study I showed that an internet-delivered aftercare intervention enabled chronic pain patients to change their perception of their body and pain and their attitude about their future and self. Furthermore, self-motivating goals and acceptance strategies appeared to influence autonomy. The results gave promise to the feasibility of IACT as aftercare following IPRP. Study II showed that chronic pain patients’ experiences of IACT vary, with respect to being in treatment and the consequences of treatment. Specifically, e-therapist feedback and deadlines for homework may have an impact on autonomy and change. Patients’ expectations, motivations, and restraints could explain treatment engagement and experiences. In Study III, IACT added during IPRP enhanced the treatment effects on pain acceptance and affective distress. Furthermore, IACT added as aftercare strengthened the long-term effect of IPRP on psychological flexibility and self-efficacy. However, unsatisfactory completion rates complicated the interpretation of the findings. Study IV showed that implementing IACT in an IPRP setting may be facilitated by contextual alinement and modifications based on patients’ needs. Thorough testing of the application and matching the intervention’s aim with the host’s needs are important not to challenge the process. An implementation framework may ease planning and evaluation of implementation processes. In conclusion, IACT could be feasible as an addition to IPRP. IACT can help chronic pain patients self-manage their pain and improve pain acceptance and self-efficacy. However, chronic pain patients’ varying experiences may need to be considered to improve treatment engagement and help patients benefit from treatment. In addition, implementation of IACT in IPRP settings is likely to depend on both flexibility to changing host needs and continuity of known pivotal components in IACT.
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| 10. |
- Boman, Kurt, et al.
(författare)
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Effects of atenolol or losartan on fibrinolysis and von Willebrand factor in hypertensive patients with left ventricular hypertrophy.
- 2010
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Ingår i: Clinical and applied thrombosis/hemostasis. - : SAGE Publications. - 1076-0296 .- 1938-2723. ; 16:2, s. 146-152
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVES: To compare the effects of the beta-blocker atenolol with the angiotensin receptor blocker (ARB) losartan on plasma tissue-type plasminogen activator (tPA) activity and mass concentration, plasminogen activator inhibitor-1 (PAI-1) activity, tPA/PAI-1 complex, and von Willebrand factor (VWF). DESIGN: A prespecified, explorative substudy in 22 patients with hypertension and left ventricular hypertrophy (LVH) performed within randomized multicenter, double-blind prospective study. RESULTS: After a median of 36 weeks of treatment, there were significant differences between the treatment groups, atenolol versus losartan, in plasma median levels of tPA mass (11.9 vs 7.3 ng/mL, P = .019), PAI-1 activity (20.7 vs 4.8 IU/mL, P = .030), and tPA/PAI-1 complex (7.1 vs 2.5 ng/mL, P = .015). In patients treated with atenolol, median levels of tPA mass (8.9-11.9 ng/mL, P = .021) and VWF (113.5%-134.3%, P = .021) increased significantly, indicating a change toward a more prothrombotic state. No significant changes occurred in the losartan group. CONCLUSION: Losartan treatment was associated with preserved fibrinolytic balance compared to a more prothrombotic fibrinolytic and hemostatic state in the atenolol group. These findings suggest different fibrinolytic and hemostatic responses to treatment in hypertensive patients with LVH.
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| 11. |
- Broberg, Erika, et al.
(författare)
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Sex Differences in Treatment and Prognosis of Acute Intracerebral Hemorrhage.
- 2023
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Ingår i: Journal of women's health (2002). - : Mary Ann Liebert Inc. - 1931-843X .- 1540-9996. ; 32:1, s. 102-108
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Tidskriftsartikel (refereegranskat)abstract
- Background: Intracerebral hemorrhage (ICH) accounts for 10%-15% of all stroke cases and is associated with a high risk of death and disability. Prior studies in ischemic stroke have demonstrated a less favorable outcome in women compared with men, but there is a paucity of data regarding differences in outcome by sex in ICH. The aim of the present study was to investigate possible sex differences in acute care and the 3-months follow-up of patients with ICH. Methods: Data were collected from the Swedish National Stroke Registry (Riksstroke). Demographic and baseline characteristics were collected, based on in-hospital data and data from 3-months follow-up. Results: Variables of interest were collected from 1,403 patients. Women (45.1%) were significantly older than men, with a mean age±standard deviation of 77±13years, versus 71±14 years, p<0.01. On admission, the ICH severity was similar in men and women. There was no significant association between sex and reception of neuroimaging or neurosurgery. Women were less likely to be treated in a stroke unit (80.8% vs. 85.3%, p=0.03), or discharged to home (51.5% vs. 63.4%, p<0.01). At 3-months follow-up, there were no sex-related differences regarding dependence, post-ICH self-reported depression, or case fatality. Conclusions: Women were less likely to be treated in a stroke unit, and were less often discharged to home. However, no significant differences in 3-month functional outcome or survival between men and women with ICH were found in this study.
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| 12. |
- Carlsson, Lena M S, 1957, et al.
(författare)
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Long-term incidence of microvascular disease after bariatric surgery or usual care in patients with obesity, stratified by baseline glycaemic status: a post-hoc analysis of participants from the Swedish Obese Subjects study.
- 2017
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Ingår i: The lancet. Diabetes & endocrinology. - 2213-8595. ; 5:4, s. 271-279
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Tidskriftsartikel (refereegranskat)abstract
- Bariatric surgery is associated with remission of diabetes and prevention of diabetic complications in patients with obesity and type 2 diabetes. Long-term effects of bariatric surgery on microvascular complications in patients with prediabetes are unknown. The aim of this study was to examine the effects of bariatric surgery on incidence of microvascular complications in patients with obesity stratified by baseline glycaemic status.Patients were recruited to the Swedish Obese Subjects (SOS) study between Sept 1, 1987, and Jan 31, 2001. Inclusion criteria were age 37-60 years and BMI of 34 kg/m(2) or greater in men and 38 kg/m(2) or greater in women. Exclusion criteria were identical in surgery and control groups and designed to exclude patients not suitable for surgery. The surgery group (n=2010) underwent gastric bypass (265 [13%]), gastric banding (376 [19%]), or vertical-banded gastroplasty (1369 [68%]). Participants in the control group (n=2037) received usual care. Bodyweight was measured and questionnaires were completed at baseline and at 0·5 years, 1 year, 2 years, 3 years, 4 years, 6 years, 8 years, 10 years, 15 years, and 20 years. Biochemical variables were measured at baseline and at 2 years, 10 years, and 15 years. We categorised participants into subgroups on the basis of baseline glycaemic status (normal [fasting blood glucose concentration <5·0 mmol/L], prediabetes [5·0-6·0 mmol/L], screen-detected diabetes [≥6·1 mmol/L at baseline visit without previous diagnosis], and established diabetes [diagnosis of diabetes before study inclusion]). We obtained data about first incidence of microvascular disease from nationwide registers and about diabetes incidence at study visits at 2 years, 10 years, and 15 years. We did the main analysis by intention to treat, and subgroup analyses after stratification by baseline glycaemic status and by diabetes status at the 15 year follow-up. The SOS study is registered with ClinicalTrials.gov, NCT01479452.4032 of the 4047 participants in the SOS study were included in this analysis. We excluded four patients with suspected type 1 diabetes, and 11 patients with unknown glycaemic status at baseline. At baseline, 2838 patients had normal blood glucose, 591 had prediabetes, 246 had screen-detected diabetes, and 357 had established diabetes. Median follow-up was 19 years (IQR 16-21). We identified 374 incident cases of microvascular disease in the control group and 224 in the surgery group (hazard ratio [HR] 0·56, 95% CI 0·48-0·66; p<0·0001). Interaction between baseline glycaemic status and effect of treatment on incidence of microvascular disease was significant (p=0·0003). Unadjusted HRs were lowest in the subgroup with prediabetes (0·18, 95% CI 0·11-0·30), followed by subgroups with screen-detected diabetes (0·39, 0·24-0·65), established diabetes (0·54, 0·40-0·72), and normoglycaemia (0·63, 0·48-0·81). Surgery was associated with reduced incidence of microvascular events in people with prediabetes regardless of whether they developed diabetes during follow-up.Bariatric surgery was associated with reduced risk of microvascular complications in all subgroups, but the greatest relative risk reduction was observed in patients with prediabetes at baseline. Our results suggest that prediabetes should be treated aggressively to prevent future microvascular events, and effective non-surgical treatments need to be developed for this purpose.US National Institutes of Health, Swedish Research Council, Sahlgrenska University Hospital Regional Agreement on Medical Education and Research, and Swedish Diabetes Foundation.
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| 13. |
- Carlsson, Lena M S, 1957, et al.
(författare)
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Long-term incidence of serious fall-related injuries after bariatric surgery in Swedish obese subjects.
- 2019
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Ingår i: International journal of obesity (2005). - : Springer Science and Business Media LLC. - 1476-5497 .- 0307-0565. ; 43:4, s. 933-937
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Tidskriftsartikel (refereegranskat)abstract
- Obesity increases risk of falling, but the effect of bariatric surgery on fall-related injuries is unknown. The aim of this study was therefore to study the association between bariatric surgery and long-term incidence of fall-related injuries in the prospective, controlled Swedish Obese Subjects study. At inclusion, body mass index was≥34kg/m2 in men and ≥38kg/m2 in women. The surgery per-protocol group (n=2007) underwent gastric bypass (n=266), banding (n=376), or vertical banded gastroplasty (n=1365), and controls (n=2040) received usual care. At the time of analysis (31 December 2013), median follow-up was 19 years (maximal 26 years). Fall-related injuries requiring hospital treatment were captured using data from the Swedish National Patient Register. During follow-up, there were 617 first-time fall-related injuries in the surgery group and 513 in the control group (adjusted hazard ratio 1.21, 95% CI, 1.07-1.36; P=0.002). The incidence differed between treatment groups (P<0.001, log-rank test) and was higher after gastric bypass than after usual care, banding and vertical banded gastroplasty (adjusted hazard ratio 0.50-0.52, P<0.001 for all three comparisons). In conclusion, gastric bypass surgery was associated with increased risk of serious fall-related injury requiring hospital treatment.
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| 14. |
- Dahl, Solveig, et al.
(författare)
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Sex differences in risk factors, treatment, and prognosis in acute stroke.
- 2020
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Ingår i: Women's health (London, England). - : SAGE Publications. - 1745-5065. ; 16
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Tidskriftsartikel (refereegranskat)abstract
- Stroke is a major cause of long-term disability and death worldwide. Several studies have shown that women in general have more severe symptoms at arrival to hospital and are less likely to return home and independent living. Our aim with the present study was to update previous results concerning sex differences in baseline characteristics, stroke management, and outcome in a population study from Sahlgrenska University Hospital, Gothenburg, Sweden.This study included patients with acute ischemic and hemorrhagic stroke in 2014 at Sahlgrenska University Hospital. All data were collected from The Swedish National Stroke Registry (Riksstroke).The study population consisted of 1453 patients, with 46.7% females. Women were 5years older than men. There was no sex difference in acute stroke severity. Frequency of revascularization was equal between men and women. The stroke mortality rate was the same between the sexes. At 3-months follow-up, women had a worse functional outcome and a higher frequency of depression and post-stroke fatigue.Our results show that there are no sex differences in management of acute stroke. However, the cause of worse functional outcome in women at 3-months follow-up, independent of other risk factors, is not clear and warrants further investigations.
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| 15. |
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| 16. |
- Ekbrand, Hans, 1972, et al.
(författare)
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The rise and fall of injury prevention programs in Sweden.
- 2016
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Ingår i: Oral presentation at the 2ned Nordic Meeting, Society for Risk Analysis Europe, in Gothenburg 14-15 november, 2016..
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- This paper is a spin‐off from a project about injury events ‐ falling, cutting and poisoning ‐ in residental settings.
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| 17. |
- Ekerstad, Niklas, et al.
(författare)
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Acute care of severely frail elderly patients in a CGA-unit is associated with less functional decline than conventional acute care
- 2017
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Ingår i: Clinical Interventions in Aging. - : DOVE MEDICAL PRESS LTD. - 1176-9092 .- 1178-1998. ; 12, s. 1239-1248
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Tidskriftsartikel (refereegranskat)abstract
- Background: A high percentage of individuals treated in specialized acute care wards are frail and elderly. Our aim was to study whether the acute care of such patients in a comprehensive geriatric assessment (CGA) unit is superior to care in a conventional acute medical care unit when it comes to activities of daily living (ADLs), frailty, and use of municipal help services. Patients and methods: A clinical, prospective, controlled trial with two parallel groups was conducted in a large county hospital in West Sweden and included 408 frail elderly patients, age 75 or older (mean age 85.7 years; 56% female). Patients were assigned to the intervention group (n=206) or control group (n=202). Primary outcome was decline in functional activity ADLs assessed by the ADL Staircase 3 months after discharge from hospital. Secondary outcomes were degree of frailty and use of municipal help services. Results: After adjustment by regression analyses, treatment in a CGA unit was independently associated with lower risk of decline in ADLs [odds ratio (OR) 0.093; 95% confidence interval (CI) 0.052-0.164; P amp;lt; 0.0001], and with a less prevalent increase in the degree of frailty (OR 0.229; 95% CI 0.131-0.400; P amp;lt; 0.0001). When ADLs were classified into three strata (independence, instrumental ADL-dependence, and personal ADL-dependence), changes to a more dependence-associated stratum were less prevalent in the intervention group (OR 0.194; 95% CI 0.085-0.444; P=0.0001). There was no significant difference between the groups in increased use of municipal help services (OR 0.682; 95% CI 0.395-1.178; P=0.170). Conclusion: Acute care of frail elderly patients in a CGA unit was independently associated with lesser loss of functional ability and lesser increase in frailty after 3 months.
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| 18. |
- Ekerstad, Niklas, 1969-, et al.
(författare)
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Is the acute care of frail elderly patients in a comprehensive geriatric assessment unit superior to conventional acute medical care?
- 2017
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Ingår i: Clinical Interventions in Aging. - : DOVE MEDICAL PRESS LTD. - 1178-1998 .- 1176-9092. ; 12
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Tidskriftsartikel (refereegranskat)abstract
- Objective: The aim of this study was to investigate whether the acute care of frail elderly patients in a comprehensive geriatric assessment (CGA) unit is superior to the care in a conventional acute medical care unit. Design: This is a clinical, prospective, randomized, controlled, one-center intervention study. Setting: This study was conducted in a large county hospital in western Sweden. Participants: The study included 408 frail elderly patients, aged ≥75 years, in need of acute in-hospital treatment. The patients were allocated to the intervention group (n=206) or control group (n=202). Mean age of the patients was 85.7 years, and 56% were female. Intervention: This organizational form of care is characterized by a structured, systematic interdisciplinary CGA-based care at an acute elderly care unit. Measurements: The primary outcome was the change in health-related quality of life (HRQoL) 3 months after discharge from hospital, measured by the Health Utilities Index-3 (HUI-3). Secondary outcomes were all-cause mortality, rehospitalizations, and hospital care costs. Results: After adjustment by regression analysis, patients in the intervention group were less likely to present with decline in HRQoL after 3 months for the following dimensions: vision (odds ratio [OR] =0.33, 95% confidence interval [CI] =0.14–0.79), ambulation (OR =0.19, 95% CI =0.1–0.37), dexterity (OR =0.38, 95% CI =0.19–0.75), emotion (OR =0.43, 95% CI =0.22–0.84), cognition (OR = 0.076, 95% CI =0.033–0.18) and pain (OR =0.28, 95% CI =0.15–0.50). Treatment in a CGA unit was independently associated with lower 3-month mortality adjusted by Cox regression analysis (hazard ratio [HR] =0.55, 95% CI =0.32–0.96), and the two groups did not differ significantly in terms of hospital care costs (P>0.05). Conclusion: Patients in an acute CGA unit were less likely to present with decline in HRQoL after 3 months, and the care in a CGA unit was also independently associated with lower mortality, at no higher cost.
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| 19. |
- Ekerstad, Niklas, 1969-, et al.
(författare)
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Short-term Resource Utilization and Cost-Effectiveness of Comprehensive Geriatric Assessment in Acute Hospital Care for Severely Frail Elderly Patients
- 2018
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Ingår i: Journal of the American Medical Directors Association. - : Elsevier BV. - 1525-8610 .- 1538-9375. ; 19:10, s. 871-8
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Tidskriftsartikel (refereegranskat)abstract
- Objective: The objective of this study was to estimate the 3-month within-trial cost-effectiveness of comprehensive geriatric assessment (CGA) in acute medical care for frail elderly patients compared to usual medical care, by estimating health-related quality of life and costs from a societal perspective. Design: Clinical, prospective, controlled, 1-center intervention trial with 2 parallel groups. Intervention: Structured, systematic interdisciplinary CGA-based care in an acute elderly care unit. If the patient fulfilled the inclusion criteria, and there was a bed available at the CGA unit, the patient was included in the intervention group. If no bed was available at the CGA unit, the patient was included in the control group and admitted to a conventional acute medical care unit. Setting and Participants: A large county hospital in western Sweden. The trial included 408 frail elderly patients, 75 years or older, in need of acute in-hospital treatment. The patients were allocated to the intervention group (n = 206) or control group (n = 202). Mean age of the patients was 85.7 years, and 56% were female. Measures: The primary outcome was the adjusted incremental cost-effectiveness ratio associated with the intervention compared to the control at the 3-month follow-up. Results: We undertook cost-effectiveness analysis, adjusted by regression analyses, including hospital, primary, and municipal care costs and effects. The difference in the mean adjusted quality-adjusted life years gained between groups at 3 months was 0.0252 [95% confidence interval (CI): 0.0082-0.0422]. The incremental cost, that is, the difference between the groups, was -3226 US dollars (95% CI: -6167 to -285). Conclusion: The results indicate that the care in a CGA unit for acutely ill frail elderly patients is likely to be cost-effective compared to conventional care after 3 months. (C) 2018 AMDA - The Society for Post-Acute and Long-Term Care Medicine.
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| 20. |
- Franco Ramos, Celina, 1956, et al.
(författare)
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Growth hormone reduces inflammation in postmenopausal women with abdominal obesity: a 12-month, randomized, placebo-controlled trial.
- 2007
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Ingår i: The Journal of clinical endocrinology and metabolism. - : The Endocrine Society. - 0021-972X .- 1945-7197. ; 92:7, s. 2644-7
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Tidskriftsartikel (refereegranskat)abstract
- CONTEXT: Abdominal obesity is associated with low GH secretion, elevated circulating markers of inflammation, and increased risk of cardiovascular disease. OBJECTIVE: The objective was to study the effect of GH treatment on inflammatory markers and vascular adhesion molecules in postmenopausal women with abdominal obesity. DESIGN: Forty women aged 51-63 yr received GH (0.67 mg/d) in a randomized, double-blind, placebo-controlled, 12-month trial. Measurements of inflammatory markers [highly sensitive C-reactive protein (CRP), IL-6, and amyloid polypeptideA] and markers of endothelial dysfunction (soluble E-selectin, vascular adhesion molecule-1, intercellular molecule-1, and matrix metalloproteinase-9) were performed at baseline and after 6 and 12 months of treatment. RESULTS: After 12 months, the mean IGF sd score was 0.9 +/- 1.5 and -0.8 +/- 0.6 in the GH and placebo groups, respectively. GH treatment reduced CRP and IL-6 levels compared with placebo (P = 0.03 and P = 0.05, respectively), whereas the markers of endothelial dysfunction were unaffected. Within the GH-treated group, a reduction was shown in CRP (4.3 +/- 4 to 3.0 +/- 3 mg/liter; P < 0.05) and in IL-6 (4.4 +/- 2 to 3.3 +/- 2 ng/liter; P < 0.01). In the GH-treated group, the decrease in CRP and IL-6 correlated with a reduction in visceral adipose tissue (r = 0.7, P < 0.001 and r = 0.5, P < 0.05, respectively). CONCLUSION: GH treatment in postmenopausal women with abdominal obesity reduced serum markers of systemic inflammation. Circulating markers of endothelial dysfunction were unaffected by treatment.
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| 21. |
- Franco Ramos, Celina, 1956, et al.
(författare)
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Growth hormone treatment reduces abdominal visceral fat in postmenopausal women with abdominal obesity: a 12-month placebo-controlled trial.
- 2005
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Ingår i: The Journal of clinical endocrinology and metabolism. - : The Endocrine Society. - 0021-972X .- 1945-7197. ; 90:3, s. 1466-74
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Tidskriftsartikel (refereegranskat)abstract
- Abdominal obesity is associated with blunted GH secretion and a cluster of cardiovascular risk factors that characterize the metabolic syndrome. GH treatment in abdominally obese men reduces visceral adipose tissue and has beneficial effects on the metabolic profile. There are no long-term data on the effects of GH treatment on postmenopausal women with abdominal obesity. Forty postmenopausal women with abdominal obesity participated in a randomized, double-blind, placebo-controlled, 12-month trial with GH (0.67 mg/d). The primary aim was to study the effect of GH treatment on insulin sensitivity. Measurements of glucose disposal rate (GDR) using a euglycemic, hyperinsulinemic glucose clamp; abdominal fat, hepatic fat content, and thigh muscle area using computed tomography; and total body fat and fat-free mass derived from (40)K measurements were performed at baseline and at 6 and 12 months. GH treatment reduced visceral fat mass, increased thigh muscle area, and reduced total and low-density lipoprotein cholesterol compared with placebo. Insulin sensitivity was increased at 12 months compared with baseline values in the GH-treated group. In the GH-treated group only, a low baseline GDR was correlated with a more marked improvement in insulin sensitivity (r = -0.68; P < 0.001). A positive correlation was found between changes in GDR and liver attenuation as a measure of hepatic fat content between baseline and 12 months (r = 0.7; P < 0.001) in the GH-treated group. In postmenopausal women with abdominal obesity, 1 yr of GH treatment improved insulin sensitivity and reduced abdominal visceral fat and total and low-density lipoprotein cholesterol concentrations. The improvement in insulin sensitivity was associated with reduced hepatic fat content.
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| 22. |
- Franco Ramos, Celina, 1956, et al.
(författare)
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Thigh intermuscular fat is inversely associated with spontaneous GH release in post-menopausal women with abdominal obesity.
- 2006
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Ingår i: European journal of endocrinology / European Federation of Endocrine Societies. - : Oxford University Press (OUP). - 0804-4643. ; 155:2, s. 261-8
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Tidskriftsartikel (refereegranskat)abstract
- CONTEXT: The metabolic syndrome is characterized by an increased accumulation of visceral adipose tissue (VAT) and blunted GH secretion. There are, however, no data on the association between GH secretion and other fat depots (in liver and muscle). OBJECTIVE/DESIGN: The aim of this cross-sectional study, which included 20 post-menopausal women with abdominal obesity, was to determine the association between GH secretion and regional adipose tissue (AT) distribution. Twelve-hour GH profiles (2000-0800 h) were performed by blood sampling every 20 min. GH was analyzed using an ultra-sensitive assay followed by approximate entropy (ApEn) and deconvolution analysis. RESULTS: In simple regression analyses, both basal and pulsatile GH secretions correlated negatively with VAT and thigh intermuscular adipose tissue (IMAT), but not with hepatic fat content. There was no correlation between ApEn and the AT depots studied. In multiple regression analysis, pulsatile GH secretion correlated inversely with thigh IMAT (B-coefficient=-0.67; P<0.01), whereas the correlation with VAT became non-significant. Furthermore, in multiple regression analysis, basal GH secretion correlated negatively with VAT (B-coefficient=-0.77; P=0.001), but not significantly with thigh IMAT. CONCLUSION: In post-menopausal women with abdominal obesity, pulsatile GH secretion demonstrated an independent, negative association with thigh IMAT, whereas basal GH secretion showed an independent, negative association with VAT. These findings suggest that the neuroendocrine association between fat mass and somatotropic axis is depot-dependent. We have identified thigh IMAT to be important in this interplay.
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| 23. |
- Hjalmarsson, Clara, 1969, et al.
(författare)
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Can prolonged QTc and cTNT level predict the acute and long-term prognosis of stroke?
- 2011
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Ingår i: International Journal of Cardiology. - : Elsevier BV. - 0167-5273. ; 155:3, s. 414-417
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: Previous studies in patients with stroke indicate that QTc prolongation and elevated cTNT are related to increased risk of all-cause and cardiovascular mortality. METHODS: We analysed the importance of electrocardiographic (ECG) abnormalities and elevated serum cardiac troponin (cTNT)-at baseline examination-as potential predictors for acute and long-term mortalities after stroke in a follow-up of 478 patients with a mean age of 78years. RESULTS: In a multivariate analysis, strong predictors for poor prognosis during the acute phase were: elevated cTNT (p=0.001); stroke severity (p=0.004); ischemia on ECG (p=0.044); and age (p=0.050). Prolonged QTc interval was on the limit to statistical significance (p=0.050) when using multivariate analysis, while clearly significant in a Cox-regression (when corrected for missing cTNT values). One year after stroke, when adjusted for covariates (gender, diabetes mellitus, hypertension, and ischemic heart disease), elevated cTNT (p=0.001), stroke severity (p=0.014), and age (p=0.031) retained a significant relation with mortality. Moreover, atrial fibrillation was strongly correlated with poor survival (p=0.009). Cox regression confirmed the predictive value of QTc, cTNT, age, and stroke severity, as markers of acute mortality in relation to stroke. CONCLUSION: Prolonged repolarization time independently predicts poor prognosis during the acute phase, but not one year after stroke. In the absence of acute myocardial infarction, elevated initial cTNT is strongly related to poor outcome, both during the acute phase and one year after stroke.
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| 24. |
- Hjalmarsson, Clara, 1969, et al.
(författare)
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Electrocardiographic Abnormalities and Elevated cTNT at Admission for Intracerebral Hemorrhage: Predictors for Survival?
- 2013
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Ingår i: Annals of noninvasive electrocardiology : the official journal of the International Society for Holter and Noninvasive Electrocardiology, Inc. - : Wiley. - 1542-474X. ; 18:5, s. 441-9
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Tidskriftsartikel (refereegranskat)abstract
- Cerebrovascular lesions are often associated with electrocardiographic (ECG) abnormalities. The main purpose of this work was to investigate the prognostic value of ECG abnormalities and/or elevated cardiac troponin (cTNT) on admission in patients with nontraumatic intracerebral hemorrhage (ICH).
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| 25. |
- Hjalmarsson, Clara, 1969, et al.
(författare)
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Neuronal and glia-related biomarkers in cerebrospinal fluid of patients with acute ischemic stroke
- 2014
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Ingår i: Journal of Central Nervous System Disease. - 1179-5735. ; 19:6, s. 51-8
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: Cerebral ischemia promotes morphological reactions of the neurons, astrocytes, oligodendrocytes, and microglia in experimental studies. Our aim was to examine the profile of CSF (cerebrospinal fluid) biomarkers and their relation to stroke severity and degree of white matter lesions (WML). METHODS: A total of 20 patients (mean age 76 years) were included within 5-10 days after acute ischemic stroke (AIS) onset. Stroke severity was assessed using NIHSS (National Institute of Health stroke scale). The age-related white matter changes (ARWMC) scale was used to evaluate the extent of WML on CT-scans. The concentrations of specific CSF biomarkers were analyzed. RESULTS: Patients with AIS had significantly higher levels of NFL (neurofilament, light), T-tau, myelin basic protein (MBP), YKL-40, and glial fibrillary acidic protein (GFAP) compared with controls; T-Tau, MBP, GFAP, and YKL-40 correlated with clinical stroke severity, whereas NFL correlated with severity of WML (tested by Mann-Whitney test). CONCLUSIONS: Several CSF biomarkers increase in AIS, and they correlate to clinical stroke severity. However, only NFL was found to be a marker of degree of WML.
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| 26. |
- Hjalmarsson, Clara, 1969, et al.
(författare)
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Risk of stroke in patients with heart failure and sinus rhythm: data from the Swedish Heart Failure Registry.
- 2021
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Ingår i: ESC heart failure. - : Wiley. - 2055-5822. ; 8:1, s. 85-94
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Tidskriftsartikel (refereegranskat)abstract
- We investigated the 2year rate of ischaemic stroke/transient ischaemic attack (IS) in patients with heart failure (HF) who were in sinus rhythm (HF-SR) and aimed to develop a score for stratifying risk of IS in this population.A total of 15425 patients (mean age 71.5years, 39% women) with HF-SR enrolled in the Swedish Heart Failure Register were included; 28815 age-matched and sex-matched controls, without a registered diagnosis of HF, were selected from the Swedish Population Register. The 2year rate of IS was 3.0% in patients and 1.4% in controls. In the patient group, a risk score including age (1p for 65-74years; 2p for 75-84years; 3p for ≥85years), previous IS (2p), ischaemic heart disease, diabetes, hypertension, kidney dysfunction, and New York Heart Association III/IV class (1p each) was generated. Over a mean follow-up of 20.1 (SD 7.5)months, the cumulative incidences (per 1000 person-years) of IS in patients with score 0 to ≥7 were 2.2, 5.3, 8.9, 13.2, 15.7, 20.4, 26.4, and 33.0, with hazard ratios for score 1 to ≥7 (with 0 as reference): 2.4, 4.1, 6.1, 7.2, 9.4, 12.2, and 15.3. The risk score performed modestly (area under the curve 63.7%; P=0.4711 for lack of fit with a logistic model; P=0.7062 with Poisson, scaled by deviance).In terms of absolute risk, only 27.6% of patients had an annual IS incidence of ≤1%. To which extent this would be amenable to anticoagulant treatment remains conjectural. A score compiling age and specific co-morbidities identified HF-SR patients with increased risk of IS with modest discriminative ability.
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| 27. |
- Hjalmarsson, Clara, 1969, et al.
(författare)
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The effect of statins on acute and long-term outcome after ischemic stroke in the elderly.
- 2012
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Ingår i: The American journal of geriatric pharmacotherapy. - : Elsevier BV. - 1876-7761 .- 1543-5946. ; 10:5, s. 313-22
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Tidskriftsartikel (refereegranskat)abstract
- Although treatment with statins has produced beneficial effects when used as secondary prevention, its primary protective role is still somewhat controversial. Moreover, few studies have evaluated the effect of statins in older patients with stroke.
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| 28. |
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| 29. |
- Hjalmarsson, Clara, 1969, et al.
(författare)
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The role of prestroke glycemic control on severity and outcome of acute ischemic stroke.
- 2014
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Ingår i: Stroke Research and Treatment. - : Hindawi Limited. - 2042-0056 .- 2090-8105. ; 2014
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Tidskriftsartikel (refereegranskat)abstract
- Background/Aim. Relatively few studies have investigated the association of prestroke glycemic control and clinical outcome in acute ischemic stroke (IS) patients, regardless of presence of diabetes mellitus (DM). The aim of this study was to investigate the importance of prestroke glycemic control on survival, stroke severity, and functional outcome of patients with acute IS. Methods. We performed a retrospective survival analysis of 501 patients with IS admitted to Sahlgrenska University Hospital from February 15, 2005, through May 31, 2009. The outcomes of interest were acute and long-term survival; the stroke severity (NIHSS) and the functional outcome, mRS, at 12 months. Results. HbA1c was a good predictor of acute (HR 1.45; CI, 1.09 to 1.93, P = 0.011) and long-term mortality (HR 1.29; CI 1.03 to 1.62; P = 0.029). Furthermore, HbA1c >6% was significantly correlated with acute stroke severity (OR 1.29; CI 1.01 to 1.67; P = 0.042) and predicted worse functional outcome at 12 months (OR 2.68; CI 1.14 to 6.03; P = 0.024). Conclusions. Our study suggests that poor glycemic control (baseline HbA1c) prior to IS is an independent risk factor for poor survival and a marker for increased stroke severity and unfavorable long-term functional outcome.
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| 30. |
- Holmström, Alexandra, et al.
(författare)
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Heart dysfunction in patients with acute ischemic stroke or TIA does not predict all-cause mortality at long-term follow-up
- 2013
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Ingår i: Bmc Neurology. - : Springer Science and Business Media LLC. - 1471-2377. ; 13
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Tidskriftsartikel (refereegranskat)abstract
- Background: Despite heart failure being a substantial risk factor for stroke, few studies have evaluated the predictive value of heart dysfunction for all-cause mortality in patients with acute ischemic stroke, in particular in the elderly. The aim of this study was to investigate whether impaired heart function in elderly patients can predict all-cause mortality after acute ischemic stroke or transient ischemic attack (TIA). Methods: A prospective long-term follow-up analysis was performed on a hospital cohort consisting of n = 132 patients with mean age 73 +/- 9 years, presenting with acute ischemic stroke or transient ischemic attack, without atrial fibrillation. All patients were examined by echocardiography during the hospital stay. Data about all-cause mortality were collected at the end of the follow-up period. The mean follow-up period was 56 +/- 22 months. Results: In this cohort, 58% of patients with acute ischemic stroke or TIA had heart dysfunction. Survival analysis showed that heart dysfunction did not predict all-cause mortality in this cohort. Furthermore, in multivariate regression analysis age (HR 5.401, Cl 1.97-14.78, p < 0.01), smoking (HR 3.181, Cl 1.36-7.47, p < 0.01), myocardial infarction (HR 2.826, Cl 1.17-6.83, p < 0.05) were independent predictors of all-cause mortality. Conclusion: In this population with acute ischemic stroke or TIA and without non-valvular atrial fibrillation, impaired heart function does not seem to be a significant predictor of all-cause mortality at long-term follow-up.
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| 31. |
- Jensen, Juliana, 1965, et al.
(författare)
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Characteristics of heart failure in the elderly--a hospital cohort registry-based study.
- 2008
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Ingår i: International journal of cardiology. - : Elsevier BV. - 1874-1754 .- 0167-5273. ; 125:2, s. 191-6
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Tidskriftsartikel (refereegranskat)abstract
- Heart failure patient in the elderly is a growing population with poor prognosis. However this patient population has not been well studied. The present study is based on a hospital cohort heart failure registry during 2005 at Heart Failure Centre Medicine, Dept. of Medicine, SU/Sahlgrenska Hospital. In this study 150 patients were enrolled consecutively for analysis. They are aged around 80 years old with high comorbidity. One-year mortality is 30%. Multivariate analyses demonstrated that significant prognostic indicators for mortality are increasing age, New York Heart Association functional class and presence of comorbidities such as chronic obstructive pulmonary disease and renal failure. The use of aldosterone receptor antagonist is also associated with poor prognosis. Prescriptions of ACE inhibitor and beta-blockers are 57.5% and 73% respectively. Added-on therapy with angiotensin receptor 1 antagonist is few. In around 30% of prescriptions of ACE inhibitors daily dose is less than half of target dose. In around 54% of beta-blockers daily dose is less than half of target dose. There are clear potential for improved medications with guideline recommended agents in light of the fact that in these study patients 82% of heart rates is >60 beats/min, 84% of S-creatinine is <150 mmol/l, 17.4% of systolic blood pressure is 140-160 mmHg and 10% is 160-180 mmHg. CONCLUSIONS: This study provides an insight into the characteristics of a very old heart failure group with high comorbidity and mortality in a real situation. In agreement with previous studies, increasing age was associated with reduced likelihood of treatment particularly in ACE inhibitor and angiotensin receptor 1 blocker but this has been improved particularly in beta-blocker. There is a need to further improve education and application of guideline recommended medications for patients with heart failure for their well-being and survival.
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| 32. |
- Khorram-Manesh, Amir, 1958, et al.
(författare)
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Reasons for longer LOS at the emergency departments: Practical, patient‐centred, medical, or cultural?
- 2020
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Ingår i: International Journal of Health Planning and Management. - : Wiley. - 0749-6753 .- 1099-1751. ; 34:4
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Tidskriftsartikel (refereegranskat)abstract
- Emergency department (ED) overcrowding is caused by external and/or internal factors. One critical internal factor, leading to longer length of stay (LOS) at ED (eg, frequent ED users), is the physician's uncertainty in management of patients with unclear diagnosis and or complex medical history. The aim of this study was to identify whether the causes of physicians' uncertainty was practical, patient‐centred, medical, or cultural. Using earlier published dimensions of uncertainty, 18 physicians were asked to reply to a template by choosing a relevant dimension that causes a delay in assessment of a known complex patient. This stage was completed by interviews through which participants had an opportunity to express their concerns and critical thoughts, if any. The data obtained from the template were collected and analysed. The interviews were recorded and transcribed verbatim. The results of the template indicated medical dimension as the main factor in delayed assessment of a complex patient. However, this finding was challenged by the results of the interviews, which indicated higher impact of personal/routines/cultural dimension (eg, being afraid of criticism, reprimand, and gossip or feelings of guilt). Although medical, patient‐centred, and practical issues are important causes of longer LOS at ED, physicians' working and professional environment may have a higher impact than previously perceived. The uncertainty caused by interpersonal, organisational, and cultural issues within a clinic/hospital seems to influence the physician's ability to make decisions and thus a patient's medical outcome.
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| 33. |
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| 34. |
- Lampl, Y., et al.
(författare)
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Infrared laser therapy for ischemic stroke: a new treatment strategy: results of the NeuroThera Effectiveness and Safety Trial-1 (NEST-1)
- 2007
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Ingår i: Stroke. - 1524-4628. ; 38:6, s. 1843-9
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND AND PURPOSE: The NeuroThera Effectiveness and Safety Trial-1 (NEST-1) study evaluated the safety and preliminary effectiveness of the NeuroThera Laser System in the ability to improve 90-day outcomes in ischemic stroke patients treated within 24 hours from stroke onset. The NeuroThera Laser System therapeutic approach involves use of infrared laser technology and has shown significant and sustained beneficial effects in animal models of ischemic stroke. METHODS: This was a prospective, intention-to-treat, multicenter, international, double-blind, trial involving 120 ischemic stroke patients treated, randomized 2:1 ratio, with 79 patients in the active treatment group and 41 in the sham (placebo) control group. Only patients with baseline stroke severity measured by National Institutes of Health Stroke Scale (NIHSS) scores of 7 to 22 were included. Patients who received tissue plasminogen activator were excluded. Outcome measures were the patients' scores on the NIHSS, modified Rankin Scale (mRS), Barthel Index, and Glasgow Outcome Scale at 90 days after treatment. The primary outcome measure, prospectively identified, was successful treatment, documented by NIHSS. This was defined as a complete recovery at day 90 (NIHSS 0 to 1), or a decrease in NIHSS score of at least 9 points (day 90 versus baseline), and was tested as a binary measure (bNIH). Secondary outcome measures included mRS, Barthel Index, and Glasgow Outcome Scale. Primary statistical analyses were performed with the Cochran-Mantel-Haenszel rank test, stratified by baseline NIHSS score or by time to treatment for the bNIH and mRS. Logistic regression analyses were conducted to confirm the results. RESULTS: Mean time to treatment was >16 hours (median time to treatment 18 hours for active and 17 hours for control). Time to treatment ranged from 2 to 24 hours. More patients (70%) in the active treatment group had successful outcomes than did controls (51%), as measured prospectively on the bNIH (P=0.035 stratified by severity and time to treatment; P=0.048 stratified only by severity). Similarly, more patients (59%) had successful outcomes than did controls (44%) as measured at 90 days as a binary mRS score of 0 to 2 (P=0.034 stratified by severity and time to treatment; P=0.043 stratified only by severity). Also, more patients in the active treatment group had successful outcomes than controls as measured by the change in mean NIHSS score from baseline to 90 days (P=0.021 stratified by time to treatment) and the full mRS ("shift in Rankin") score (P=0.020 stratified by severity and time to treatment; P=0.026 stratified only by severity). The prevalence odds ratio for bNIH was 1.40 (95% CI, 1.01 to 1.93) and for binary mRS was 1.38 (95% CI, 1.03 to 1.83), controlling for baseline severity. Similar results held for the Barthel Index and Glasgow Outcome Scale. Mortality rates and serious adverse events (SAEs) did not differ significantly (8.9% and 25.3% for active 9.8% and 36.6% for control, respectively, for mortality and SAEs). CONCLUSIONS: The NEST-1 study indicates that infrared laser therapy has shown initial safety and effectiveness for the treatment of ischemic stroke in humans when initiated within 24 hours of stroke onset. A larger confirmatory trial to demonstrate safety and effectiveness is warranted.
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| 35. |
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| 36. |
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| 37. |
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| 38. |
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| 39. |
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| 40. |
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| 41. |
- Lyxell, Björn, 1956-, et al.
(författare)
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Working memory and speech understanding.
- 1998
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Ingår i: Audio-visual speech processing.. - Sydney : Casual Publisher. ; , s. 133-137
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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| 42. |
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| 43. |
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| 44. |
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| 45. |
- Rönnberg, Jerker, 1953-, et al.
(författare)
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Cognitive predictors of visual speech understanding
- 2001
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Ingår i: Journal of Deaf Studies and Deaf Education. - : Oxford University Press. - 1081-4159 .- 1465-7325. ; 6, s. 103-115
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Tidskriftsartikel (refereegranskat)
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| 46. |
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| 47. |
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| 48. |
- Solli, Martin, 1980-, et al.
(författare)
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Color measurements with a consumer digital camera using spectral estimation techniques
- 2005
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Ingår i: IMAGE ANALYSIS, PROCEEDINGS. - Berlin : Springer Verlag. - 3540263209 ; , s. 105-114, s. 105-114
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Konferensbidrag (refereegranskat)abstract
- The use of spectrophotometers for color measurements on printed substrates is widely spread among paper producers as well as within the printing industry. Spectrophotometer measurements are precise, but time-consuming procedures and faster methods are desirable. The rapid development of digital cameras has opened the possibility to use consumer digital cameras as substitutes for spectrophotometers for certain applications such as production control. Two methods for estimating the reflectance properties of objects from camera RGB measurements using linear estimation techniques combined with linear and non-linear constraints are presented. In the experiments, we have investigated if these techniques can be used to measure the reflectance properties of flat objects such as printed pages of paper. Reflectances were converted to CIELAB color values, and the minimization of color errors were evaluated with CIE color difference formulas. Our experiments show that a consumer digital camera can be used as a fast and inexpensive alternative to spectrophotometers for color measurements on printed substrates.
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| 49. |
- Solli, Martin, 1980-, et al.
(författare)
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Digital Camera Characterization for Color Measurements
- 2005
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Ingår i: 2005 Beijing International Conference on Imaging: Technology and Applications for the 21st Century, 2005. - : Science Press. ; , s. 278-279
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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| 50. |
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