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Sökning: WFRF:(Brudin Lars)

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1.
  • Hellström, Lennart, 1945-, et al. (författare)
  • Cadmium exposure pathways in a population living near a battery plant
  • 2007
  • Ingår i: Science of the Total Environment. - : Elsevier BV. - 0048-9697 .- 1879-1026. ; 373:2-3, s. 447-455
  • Tidskriftsartikel (refereegranskat)abstract
    • Objectives: The objectives of the present study were to assess the relative impact of different pathways of environmental cadmium (Cd) exposure and to evaluate the contribution from locally produced vegetables and root crops to the total dietary intake of Cd. Methods: Cadmium in urine was determined for 492 individuals living near a closed down battery factory in Sweden. For each individual we created an environmental exposure-index based on Cd emissions to ambient air and number of years living at various distances from the plant. This information as well as dietary data were collected via questionnaires. Samples of soil, carrots and/or potatoes were collected from 37 gardens and analysed for Cd concentration. Results: Eating homegrown vegetables/potatoes, environmental Cd-exposure-index, female gender, age above 30 years and smoking more than one pack of cigarettes daily for at least 10 years were found to be significantly associated with increased urine concentrations of Cd (UCd > 1.0 nmol/mmol creatinine). We found a statistically significant relation between Cd in urine and environmental Cd-exposure-index in persons eating homegrown vegetables/potatoes regularly. Cd concentrations in homegrown carrots, potatoes and in garden soil were highest in the area closest to the factory. Daily consumption of potatoes and vegetables cultivated in the vicinity of the closed battery factory was estimated to increase Cd intake by 18-38%. Conclusion: The present study shows that consumption of locally grown vegetables and root crops was an important exposure pathway, in subjects living near a nickel-cadmium battery plant, whereas direct exposure via ambient air was less important. © 2006 Elsevier B.V. All rights reserved.
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2.
  • Lexne, Erik (författare)
  • Psychiatric aspects on acute abdominal pain
  • 2021
  • Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
    • Introduction: Psychiatric comorbidity is estimated to occur in up to 40% of all patients with somatic disorders, and it can have an influence on patient morbidity and mortality. Approximately 20% of patients who seek care for abdominal pain receive the diagnosis nonspecific abdominal pain, and later develop chronic abdominal pain. This condition and other abdominal conditions without organic explanation are sometimes called diseases of gut-braininteraction, and psychosocial factors (personality, psychiatric conditions, etc.) have been suggested to play an important role. Organic dyspepsia (which in this thesis is limited to pepticulcer, gastritis and gastro-esophageal reflux disease, or GERD) has previously been reported to be associated with personality traits and psychiatric conditions. Despite these known associations, few studies have specifically investigated psychiatric comorbidity in patients with acute abdominal conditions.The aim of this thesis is to investigate the prevalence of psychiatric comorbidity in patients with acute abdominal pain conditions in the emergency setting and to evaluate the possible longterm psychiatric problems of these patients.Methods: Consecutive patients with who came to emergency care with acute abdominal pain conditions were divided into three diagnostic groups: acid-dependent organic dyspepsia (pepticulcer, gastritis and GERD), specific abdominal diagnoses, and non-specific abdominal pain.These groups were evaluated for personality traits, psychiatric symptoms, and self-rated health.A follow-up study explored prescription of antidepressant and anxiolytic (anti-anxiety) medications in this patients 10–15 years after the initial visit to emergency care.Results: Among the various diagnostic groups, patients with acid-dependent organic dyspepsia had significantly more anxiety-related personality traits, less mature characters, significantly more psychiatric symptoms, and poorer self-rated health. Patients with nonspecific abdominal pain also had more personality traits associated with anxiety, although to a lesser extent. Personality factors were significantly associated with poor self-rated health. The long-term follow-up showed that patients with organic dyspepsia and non-specific abdominal pain were prescribed antidepressants and anxiolytic drugs statistically more often than patients with specific abdominal diagnoses.Conclusion: Patients with abdominal pain who seek emergency care have enhanced psychiatric comorbidity, more anxiety-related personality traits, and poorer perceived health.This trend is particularly evident in patients with a diagnosis of acid-dependent organicdyspepsia, and to a lesser degree, patients with a diagnosis of non-specific abdominal pain.These factors also predict future prescription of depression and anxiety medications. These results suggest that patients who come to emergency care with acute abdominal pain could potentially benefit from psychiatric consultation.
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3.
  • Moen, Vibeke, et al. (författare)
  • Feto-maternal osmotic balance at term. A prospective observational study
  • 2018
  • Ingår i: Journal of Perinatal Medicine. - : WALTER DE GRUYTER GMBH. - 0300-5577 .- 1619-3997. ; 46:2, s. 183-189
  • Tidskriftsartikel (refereegranskat)abstract
    • Objective: We performed the present study to investigate the feto-maternal osmotic relationship at term with the hypothesis that, in contrast to the literature, maternal plasma osmolality is lower than fetal levels. In a previous study, we found that maternal plasma sodium at delivery was consistently lower than the sodium in the umbilical artery. Our aim was to corroborate these results with analysis of osmolality. Methods: Blood was sampled from 30 women immediately before cesarean section and from the umbilical artery and vein before cord clamping and osmolality, sodium and albumin were analyzed. Results: Maternal osmolality was (mean; 95% confidence interval) 287.0 (285.8-288.2) mOsmkg/kg, arterial cord osmolality was 289.4 (287.9-291.0) mOsm/kg and venous cord osmolality was 287.3 (286.0-288.5) mOsm/kg. The paired difference between maternal and umbilical arterial osmolality was mean (SD) -2.4 (3.3) mOsm/kg (P amp;lt; 0.001), between maternal and umbilical vein -0.3 (3.0) mOsm/kg (P = 0.63) and between umbilical artery and vein -2.1 (2.8) mOsm/kg (P amp;lt; 0.001). Conclusion: Maternal osmolality was significantly lower than arterial cord osmolality confirming our previous results. The feto-maternal osmotic gradient favors water transport from the mother to the fetus and may increase the fetal risk of water intoxication when the mother ingests or is administered large volumes of electrolyte free solutions.
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4.
  • Moen, Vibeke, et al. (författare)
  • Hyponatraemia reversibly affects human myometrial contractility. An in vitro pilot study
  • 2020
  • Ingår i: PLOS ONE. - : PUBLIC LIBRARY SCIENCE. - 1932-6203. ; 15:1
  • Tidskriftsartikel (refereegranskat)abstract
    • Background In a previous study we found a significant correlation between dystocia and hyponatraemia that developed during labour. The present study examined a possible causal relationship. In vitro studies often use area under the curve (AUC) determined by frequency and force of contractions as a measure of myometrial contractility. However, a phase portrait plot of isometric contraction, obtained by plotting the first derivate of contraction against force of contraction, could indicate that bi-or multiphasic contractions might be less effective compared to the smooth contractions. Material and methods Myometrial biopsies were obtained from 17 women undergoing elective caesarean section at term. Each biopsy was divided into 8 strips and mounted isometrically in a force transducer. Seven biopsies were used in the first part of the study when half of the strips were immersed in the hyponatraemic study solution S containing Na+ 120 mmol/L and observed for 1 hour, followed by 1 hour in normonatraemic control solution C containing Na+ 136 mmol/L, then again in S for 1 hour, and finally 1 hour in C. The other half of the strips were studied in reverse order, C-S-C-S. The remaining ten biopsies were included in the second part of the study. Response to increasing doses of oxytocin (OT) in solutions S and C was studied. In the first part of the study we calculated AUC, and created phase portrait plots of two different contractions from the same strip, one smooth and one biphasic. In both parts of the study we registered frequency and force of contractions, and described appearance of the contractions. Results First part of the study: Mean (median) contractions per hour in C: 8.7 (7.6), in S 14,3 (13). Mean (SD) difference between groups 5.6 (4.2), p = 0.018. Force of contractions in C: 11.8 (10.2) mN, in S: 10.8 (9.2) mN, p = 0.09, AUC increased in S; p = 0.018. Bi-/multiphasic contractions increased from 8% in C to 18% in S, p = 0.001. All changes were reversible in C. Second part of the study: Frequency after OT 1.65 x 10-(9) M in C:3.4 (2.9), in S: 3.8 (3.2), difference between groups: p = 0.48. After OT 1.65 x 10-(7) M in C: 7.8 (8.9), increase from previous OT administration: p = 0.09, in S: 8.7 (9.0), p = 0.04, difference between groups, p = 0.32. Only at the highest dose of OT dose was there an increase in force of contraction in S, p = 0.05, difference between groups, p = 0.33. Initial response to OT was more frequently bi/multiphasic in S, reaching significance at the highest dose of OT(1.65 x 10-(7) M), p = 0.015. when almost all contractions were bi/multiphasic. Conclusion Hyponatraemia reversibly increased frequency of contractions and appearance of bi-or multiphasic contractions, that could reduce myometrial contractility. This could explain the correlation of hyponatraemia and instrumental delivery previously observed. Contractions in the hyponatraemic solution more frequently showed initial multiphasic contractions when OT was added in increasing doses. Longer lasting labours carry the risk both of hyponatraemia and OT administration, and their negative interaction could be significant. Further studies should address this possibility.
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5.
  • Nayeri, Fariba, 1958-, et al. (författare)
  • Hepatocyte Growth Factor Levels in Cerebrospinal Fluid : A Comparison between Acute Bacterial and Nonbacterial Meningitis
  • 2000
  • Ingår i: Journal of Infectious Diseases. - : Oxford University Press (OUP). - 0022-1899 .- 1537-6613. ; 181:6, s. 2092-2094
  • Tidskriftsartikel (refereegranskat)abstract
    • The organotrophic functions of the hepatocyte growth factor (HGF) have been the subject of several studies. In the more recent studies, this function has been reported in the brain. In the present study, we have measured the levels of HGF in cerebrospinal fluid (CSF) and sera from 78 patients divided into 6 different groups according to central nervous system (CNS) infection and control. Quantitative measurements of HGF in the CSF and serum were performed by an enzyme-linked immunosorbent assay. Elevated values of CSF HGF were found in the patients with acute bacterial/probable bacterial meningitis (P < .001), compared with nonbacterial CNS infections and facial palsy, as well as with a control group without signs of CNS involvement. The values of CSF HGF were not correlated to blood-brain-barrier disruption in the groups. These observations might indicate an intrathecal production of HGF in acute bacterial/probable bacterial meningitis.
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6.
  • Neumark, Thomas, 1954-, et al. (författare)
  • Evaluation of phenoxymethylpenicillin treatment of acute otitis media in children aged 2-16
  • 2007
  • Ingår i: Scandinavian Journal of Primary Health Care. - : Informa UK Limited. - 0281-3432 .- 1502-7724. ; 25:3, s. 166-171
  • Tidskriftsartikel (refereegranskat)abstract
    • Objective. To study the clinical recovery from acute otitis media (AOM) in children, 2-16 years of age, managed with or without treatment with phenoxymethylpenicillin (PcV).Design. An open, prospective randomized trial. Children aged between 2 and 16 years, presenting with one- or double-sided AOM (without perforation) with symptom duration of less than four days, were included. The children were randomized to PcV for five days or to no primary antibiotic treatment. A health score and compliance were registered on a daily basis for seven days. Setting. A total of 32 health centres and 72 GPs in south-east Sweden.Subjects. Children aged 2-16 presenting with earache. Main outcome measures. Recovery time, symptom duration, frequency of complications (up to three months) and consumption of healthcare services independent of treatment with or without antibiotics.Results. A total of 179 patients carried out the trial, 92 were randomized to PcV, 87 to no primary antibiotic treatment. The median recovery time was four days in both groups. Patients who received PcV had less pain (p <0.001) and used fewer analgesics. There were no significant differences in the number of middle-ear effusions or perforations at the final control after three months. Children randomized to PcV treatment consulted less (p <0.001) during the first seven days.Conclusions. Our investigation supports that PcV treatment of AOM does not affect the recovery time or complication rates. PcV provided some symptomatic benefit in the treatment of AOM in otherwise healthy children, aged 2-16 years.
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7.
  • Petersson, Ulla, 1947- (författare)
  • Screening for Cardiovascular Risk and Diabetes in Primary Health Care : The Söderåkra Risk Factor Screening Study
  • 2009
  • Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
    • Background: Cardiovascular disease (CVD) has been the predominant cause of morbidity and mortality for many decades in Sweden. Preventive work in primary health care through individual approach and community-based programmes has shown some success. Still, we need better risk assessment tools and health strategies to lessen the burden of CVD in our population.Methods: This thesis is based on four studies that explore the cardiovascular risk factor pattern and its development to CVD morbidity and mortality in the middle-aged (40-59 years) population in Söderåkra, southern Sweden, 1989-2006. At a single physician consultation in 1989-1990 the participants provided information about lifestyle in a self-administered questionnaire, underwent a physical examination and received medical advice after a laboratory investigation. The laboratory tests consisted mainly of blood glucose, serum lipids and thyroid function tests. Blood samples were also frozen for later analyses. A telephone interview on self-reported lifestyle changes was conducted ten years later. In 2006, primary health care medical records were studied for incident diabetes and also for impaired glucose tolerance (IGT). Finally, national registers were studied for incident fatal or nonfatal cardiovascular disease until 2006. Cardiovascular risk assessments using three separate risk algorithms were applied on the population.Results: The participation rate was high with 90% attendance. The conclusion of this cross-sectional baseline analysis was that it is meaningful to check for a secondary cause of hyperlipidemia, hypothyroidism, in women with a cholesterol value above 7.0 mmol/L. After 10 years follow-up women reported significantly more lifestyle changes than men, odds ratio (OR) 1.56 (95% CI: 1.11- 2.18; p= 0.010). Men with a history of smoking or CVD at baseline and women with treated hypertension at baseline made successful lifestyle changes, OR 4.77 (95% CI: 2.18-10.5; p<0.001 and OR 1.84 (95% CI: 1.12-3.02; p= 0.016), respectively, than those without these characteristics. Until 2006, 38 participants had developed diabetes and four subjects IGT out of 664 participants, excluding 10 with diabetes at baseline. A low level of IGFBP-1 at baseline was associated with the development of type 2 diabetes/IGT, hazard ratio (HR) 3.54 (95% CI: 1.18-10.6, p=0.024). This was independent of abdominal obesity or inflammation (CRP). After excluding 16 participants with prevalent CVD at baseline, 71 first fatal or nonfatal CVD events in 689 men and women were registered. Several known risk factors and risk markers were applied on this population.Those that turned out to be significantly associated with development of incident CVD in univariate Cox´s regression proportional hazard analyses where used in three different risk assessment models: the consultation model, SCORE and the extensive model. A non-laboratory-based risk assessment model, including variables easily obtained during one consultation visit to a general practitioner (GP), predicted cardiovascular events as accurately, HR 2.72; (CI 95% 2.18-3.39, p<0.001), as the established SCORE algorithm, HR 2.73; (CI 95% 2.10-3.55, p<0.001), which requires laboratory testing. Furthermore, adding laboratory measurements covering lipids, inflammation and endothelial dysfunction, did not confer any additional value to the prediction of CVD risk, HR 2.72; (CI 95% 2.19-3.37, p<0.001). The c-statistics for the consultation model (0.794; CI 95% 0.762-0.823) was not significantly different from SCORE (0.767; CI 95% 0.733-0.798, p=0.12) or the extended model (0.806; CI 95% 0.774-0.835, p=0.55).Conclusions: Our study showed that it is worth searching for hypothyroidism, in women with a cholesterol value above 7 mmol/L. The study identified female gender, previous CVD, hypertension and smoking as predictors of positive lifestyle change during follow-up. A low level of IGFBP-1 predicted future diabetes/IGT in this population as did increased waist and CRP. Finally, data on nonlaboratory risk factors obtained during one GP visit predicted future cardiovascular risk as accurately as SCORE or a laboratory-based risk algorithm.
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8.
  • Semark, Birgitta, et al. (författare)
  • Factors influencing the prescription of drugs of different price levels
  • 2013
  • Ingår i: Pharmacoepidemiology and Drug Safety. - : Wiley-Blackwell. - 1053-8569 .- 1099-1557. ; 22:3, s. 286-293
  • Tidskriftsartikel (refereegranskat)abstract
    • Purpose Socioeconomic factors have been suggested to influence the prescribing of newer and more expensive drugs. In the present study, individual and health care provider factors were studied in relation to the prevalence of differently priced drugs. Methods Register data for dispensed drugs were retrieved for 18486 individuals in a county council in Sweden. The prevalence of dispensed drugs was combined with data for the individuals gender, age, education, income, foreign background, and type of caregiver. For each of the diagnostic groups (chronic obstructive pulmonary disease [COPD], depression, diabetes, and osteoporosis), selected drugs were dichotomized into cost categories, lower and higher price levels. Univariate and multivariate logistic regressions were performed using cost category as the dependent variable and the individual and provider factors as independent variables. Results In all four diagnostic groups, differences were observed in the prescription of drugs of lower and higher price levels with regard to the different factors studied. Age and gender affected the prescription of drugs of lower and higher price levels more generally, except for gender in the osteoporosis group. Income, education, foreign background, and type of caregiver affected prescribing patterns but in different ways for the different diagnostic groups. Conclusions Certain individual and provider factors appear to influence the prescribing of drugs of different price levels. Because the average price for the cheaper drugs versus more costly drugs in each diagnostic group was between 19% and 69%, there is a risk that factors other than medical needs are influencing the choice of drug.
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10.
  • Trzebiatowska-Krzynska, Aleksandra, 1964-, et al. (författare)
  • Afterload dependence of right ventricular myocardial deformation : A comparison between tetralogy of Fallot and atrially corrected transposition of the great arteries in adult patients
  • 2018
  • Ingår i: PLOS ONE. - San Francisco, CA, United States : Public Library of Science. - 1932-6203. ; 13:9
  • Tidskriftsartikel (refereegranskat)abstract
    • BackgroundPrior studies suggested that myocardial deformation is superior to conventional measures for assessing ventricular function. This study aimed to evaluate right ventricular (RV) myocardial deformation in response to increased afterload. Patients with the RV in the systemic position were compared with patients with the RV in the sub-pulmonic position with normal or only slightly elevated systolic right ventricular pressure. Correlations between global longitudinal strain (GLS), radial strain, atrioventricular plane displacement (AVPD), and exercise capacity were evaluated.Methods44 patients with congenital heart defect were enrolled in the study. The control group consisted of seven healthy volunteers. All patients underwent cardiovascular magnetic resonance (CMR) and cardiopulmonary exercise testing. We assessed biventricular myocardial function using CMR based feature tracking and compared the results to anatomic volumes.ResultsStrain analysis and displacement measurements were feasible in all participants. RVGLS and RVAVPD were reduced in both study groups compared to the control group (p<0.001). Left ventricular (LV) radial strain was significantly lower in patients with a systemic RV than in those with a subpulmonic RV and lower than in controls (p<0.001). Both LVAVPD and RVAVPD were significantly depressed in patients compared to controls (p<0.05). RVAVPD was more depressed in patients with a high systolic RV pressure than in those with normal RV pressure (p<0.001). RVAVPD did not correlate with exercise capacity in either study group. Exercise capacity in both patient groups was depressed to levels reported in previous studies, and did not correlate with RVGLS.ConclusionsBoth study groups had abnormal myocardial deformation and increased RV volumes. RVGLS in patients was lower than in controls, confirming the effect of increased afterload on myocardial performance.
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