| 1. |
- Basoglu, Ozen K, et al.
(författare)
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Change in weight and central obesity by positive airway pressure treatment in obstructive sleep apnea patients: longitudinal data from the ESADA cohort.
- 2018
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Ingår i: Journal of sleep research. - : Wiley. - 1365-2869 .- 0962-1105. ; 27:6
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Tidskriftsartikel (refereegranskat)abstract
- The effect of positive airway pressure treatment on weight and markers of central obesity in patients with obstructive sleep apnea remains unclear. We studied the change in body weight and anthropometric measures following positive airway pressure treatment in a large clinical cohort. Patients with obstructive sleep apnea with positive airway pressure treatment from the European Sleep Apnea Database registry (n=1,415, 77% male, age 54±11 [mean±SD] years, body mass index 31.7±6.4kg/m2 , apnea-hypopnea index 37±24n per hr, Epworth Sleepiness Scale 10.2±5.0) were selected. Changes in body mass index and neck/waist/hip circumferences at baseline and at follow-up visit were analysed. Overall, body mass index (0.0 [95% confidence interval, -0.1 to 0.2]kg/m2 ) and neck circumference (0.0 (95% confidence interval, -0.1 to 0.1]cm) were unchanged after positive airway pressure treatment compared with baseline (follow-up duration 1.1±1.0years and compliance 5.2±2.1hr per day). However, in non-obese (body mass index <30kg/m2 ) patients, positive airway pressure treatment was associated with an increased body mass index and waist circumference (0.4 [0.3-0.5]kg/m2 and 0.8 [0.4-1.2]cm, respectively, all p<0.05), and weight gain was significantly associated with higher positive airway pressure compliance and longer positive airway pressure treatment duration. In the obese subgroup, body mass index was reduced after positive airway pressure treatment (-0.3 [-0.5 to -0.1]kg/m2 , p<0.05) mainly in patients with a strong reduction in Epworth Sleepiness Scale. In conclusion, positive airway pressure therapy was not found to systematically change body mass index in the European Sleep Apnea Database cohort, but the response was heterogeneous. Our findings suggest that weight gain may be restricted to an obstructive sleep apnea phenotype without established obesity. Lifestyle intervention needs to be considered in both lean and obese patients with obstructive sleep apnea receiving positive airway pressure treatment.
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| 2. |
- Dieltjens, Marijke, et al.
(författare)
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Use of the Clinical Global Impression scale in sleep apnea patients-Results from the ESADA database.
- 2019
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Ingår i: Sleep medicine. - : Elsevier BV. - 1878-5506 .- 1389-9457. ; 59, s. 56-65
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Tidskriftsartikel (refereegranskat)abstract
- The Clinical Global Impression scale (CGI) reflects the clinician's assessment of the disease impact on patient's global functioning. We assessed predictors of CGI scale rating in patients with obstructive sleep apnea (OSA).Consecutive patients with suspected OSA (n=7581) were identified in the European Sleep Apnea Database (ESADA). Anthropometrics, comorbidities, apnea severity obtained by polygraphy or polysomnography, and daytime sleepiness [Epworth Sleepiness Scale (ESS)] were assessed. The CGI 7-point scale was completed at the end of the diagnostic process (CGI-severity, ie, CGI-S) and, in a subpopulation, at treatment follow-up (CGI-Improvement).CGI-S was rated mild to moderate in 44% of patients. CGI rating at any given apnea intensity was worse in women than in men (p<0.01). Patients undergoing polygraphy (n=5075) were more frequently rated as severely ill compared to those studied with polysomnography (19.0% vs 13.0%, p<0.001). In patients aged ≤65 years, CGI scoring was generally better than in the elderly despite a similar degree of OSA (eg, 'normal, not ill' 24.2% vs 15.3%, p<0.01, respectively). Independent predictors of CGI rating included age, BMI, AHI, ESS, cardio-metabolic comorbidities, and diagnosis based on polygraphy. CGI-improvement rating (Beta=-0.406, p<0.01) was superior to sleep apnea severity or ESS-score (Beta=0.052 and-0.021, p=0.154 and 0.538 respectively) at baseline for prediction of good CPAP compliance at follow-up.CGI rating is confounded by gender, age class and the type of sleep diagnostic method. As OSA phenotypes differ, CGI may contribute as a clinical tool to reflect the significance of clinical disease.
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| 3. |
- Eder, Derek, 1959, et al.
(författare)
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Self-Reported Features of Sleep, Utilization of Medical Resources, and Socioeconomic Position: A Swedish Population Survey
- 2011
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Ingår i: Behavioral Sleep Medicine. - 1540-2002. ; 9:3, s. 162-172
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Tidskriftsartikel (refereegranskat)abstract
- This study examined aspects of self reported qualities of sleep and daytime functioning attributed to sleep, including the utilization of physician consultations and prescription medications, and their relationships with age, gender, and educational attainment in the Swedish population using telephone interviews of 1,000 random households. Women were twice as likely to use hypnotics and experienced more poor quality sleep and excessive daytime sleepiness (EDS). Lower educational attainment was associated with twofold increased hypnotic use, life impacts of sleep problems, and EDS, but not dimensions reflecting poor quality sleep. This study demonstrates that educational attainment, gender, and age combine to shape both the attributions of the effects of sleep on wakeful functioning and patterns of using medical resources.
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| 4. |
- Eskandari, Davoud, et al.
(författare)
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Acetazolamide Reduces Blood Pressure and Sleep-Disordered Breathing in Patients with Hypertension and Obstructive Sleep Apnea: A Randomized Controlled Trial
- 2018
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Ingår i: Journal of Clinical Sleep Medicine. - : American Academy of Sleep Medicine (AASM). - 1550-9389 .- 1550-9397. ; 14:3, s. 309-317
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Tidskriftsartikel (refereegranskat)abstract
- Study Objectives: The carbonic anhydrase inhibitor acetazolamide (AZT) modulates blood pressure at high altitude and reduces sleep-disordered breathing in patients with obstructive sleep apnea (OSA). We aimed to investigate the treatment effect of AZT and in combination with continuous positive airway pressure (CPAP) on blood pressure in patients with hypertension and OSA. Methods: In a prospective, randomized, three-way crossover study, 13 male patients with hypertension and moderate to severe OSA (age 64 ± 7 years, body mass index 29±4 kg/m2, and mean apnea-hypopnea index 37±23 events/h) received AZT, CPAP, or AZT plus CPAP for 2-week periods. Antihypertensive medication was washed out. Office and 24-hour blood pressure, arterial stiffness, polygraphic sleep study data, and blood chemistry were compared. Results: AZT alone and AZT plus CPAP, but not CPAP alone, reduced office mean arterial pressure compared to baseline (-7 [95% CI-11 to-4],-7 [95% CI-11 to-4] and-1 [95% CI-5 to 4] mmHg, respectively; repeated-measures analysis of variance (RM-ANOVA; P = .015). Aortic systolic pressure and augmentation index, assessed by radial artery oscillatory tonometry, were unaffected by CPAP but decreased after AZT and AZT plus CPAP (RM-ANOVA P = .030 and .031, respectively). The apnea-hypopnea index was significantly reduced in all three treatment arms, most prominently by AZT plus CPAP (RM-ANOVA P = .003). The reduction of venous bicarbonate concentration following AZT was correlated with the change of apnea-hypopnea index (r = 0.66, P = .013). Conclusions: AZT reduced blood pressure, vascular stiffness, and sleep-disordered breathing in patients with OSA and comorbid hypertension. Carbonic anhydrase inhibition may constitute a potential target for drug therapy in patients with sleep apnea and comorbid hypertension.
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| 5. |
- Eskandari, Davoud, et al.
(författare)
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Independent associations between arterial bicarbonate, apnea severity and hypertension in obstructive sleep apnea
- 2017
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Ingår i: Respiratory Research. - : Springer Science and Business Media LLC. - 1465-993X. ; 18
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Tidskriftsartikel (refereegranskat)abstract
- Background: Obstructive sleep apnea is characterized by intermittent hypoxia and hypercapnia. CO2 production, transport and elimination are influenced by the carbonic anhydrase enzyme. We hypothesized that elevated standard bicarbonate, a proxy for increased carbonic anhydrase activity, is associated with apnea severity and higher blood pressure in patients with obstructive sleep apnea. Methods: A retrospective analysis of a sleep apnea cohort (n = 830) studied by ambulatory polygraphy. Office systolic/diastolic blood pressure, lung function, and arterial blood gases were assessed during daytime. Results: Arterial standard bicarbonate was increased with apnea severity (mild/moderate/severe 24.1 +/- 1.8, 24.4 +/- 1.7 and 24.9 +/- 2.9 mmol/l, respectively, Kruskal-Wallis test p < 0.001). Standard bicarbonate was independently associated with apnea hypopnea index after adjustment for sex, age, body mass index, smoking, alcohol, hypertension, pO(2) and pCO(2) (standard bicarbonate quartile 1 vs. quartile 4, beta = 10.6, p < 0.001). Log-transformed standard bicarbonate was associated with a diagnosis of hypertension or diastolic blood pressure but not systolic blood pressure adjusting for cofounders (p = 0.007, 0.048 and 0.45, respectively). Conclusions: There was an independent association between sleep apnea severity and arterial standard bicarbonate. The link between high standard bicarbonate and daytime hypertension suggests that carbonic anhydrase activity may constitute a novel mechanism for blood pressure regulation in sleep apnea.
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| 6. |
- Eskandari, Davoud, et al.
(författare)
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Zonisamide reduces obstructive sleep apnoea: a randomised placebo-controlled study
- 2014
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Ingår i: European Respiratory Journal. - : European Respiratory Society (ERS). - 0903-1936 .- 1399-3003. ; 44:1, s. 140-149
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Tidskriftsartikel (refereegranskat)abstract
- Carbonic anhydrase inhibition reduces apnoeic events in sleep disordered breathing. Zonisamide inhibits carbonic anhydrase, and induces weight loss in obese patients. This study explored the relative influence of these two properties, which may both alleviate obstructive sleep apnoea (OSA). Continuous positive airway pressure (CPAP) was used as a standard care comparator. 47 patients with moderate-to-severe OSA and a body mass index of 27-35 kg.m(-2) were randomised to receive either zonisamide, placebo or CPAP for 4 weeks. The open extension phase (20 weeks) compared CPAP and zonisamide. Polysomnography, biochemistry and symptoms were evaluated. At 4 weeks, zonisamide reduced apnoea/hypopnoea index (AHI) by a mean +/- SD 33 +/- 39% and oxygen desaturation index by 28 +/- 31% (p=0.02 and 0.014, respectively; placebo adjusted). The mean compliance adjusted reduction of AHI after zonisamide and CPAP was 13 and 61%, respectively, (p=0.001) at 24 weeks. Body weight was marginally changed at 4 weeks, but reduced after zonisamide and increased after CPAP at 24 weeks (-2.7 +/- 3.0 kg versus 2.3 +/- 2.0 kg, p<0.001). Zonisamide decreased bicarbonate at 4 and 24 weeks. Side-effects were more common after zonisamide. Zonisamide reduced OSA independent of body weight potentially by mechanisms related to carbonic anhydrase inhibition. The effect was less pronounced than that obtained by CPAP.
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| 7. |
- Fridriksson, Benedikt, 1987, et al.
(författare)
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Beneficial Effects of Early Intervention Telemedicine-based Follow-Up in Sleep Apnea A Randomized Controlled Multicenter Trial
- 2023
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Ingår i: Annals of the American Thoracic Society. - 1546-3222. ; 20:10, s. 1499-1507
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Tidskriftsartikel (refereegranskat)abstract
- Rationale: Positive airway pressure (PAP) is standard treatment for obstructive sleep apnea. Telemedicine has been introduced for improved PAP follow-up. Objectives: Our study aim was to evaluate the clinical utility of and patient satisfaction with PAP follow-up with an early intervention telemedical protocol. Methods: A randomized controlled trial was conducted at four sleep clinics of the same county. Treatment-naive patients with obstructive sleep apnea were randomized to standard PAP follow-up (203 patients, fixed follow-up procedures) or early intervention telemedical follow-up (AirView, ResMed; 206 patients, continuous follow-up) for 3 months. Evaluated variables included PAP adherence at 3 months, patient-reported outcome measures (Epworth Sleepiness Scale, 36-item Short Form Health Survey, Insomnia Severity Index, Hospital Anxiety and Depression Scale), and staff time. Group differences were analyzed with linear mixed regression models adjusted for age, body mass index, apnea-hypopnea index, and study center. Results: The study groups were comparable at baseline (N= 409; mean age, 59 +/- 12 yr; body mass index, 31.9 +/- 6 kg/m(2), apnea-hypopnea index, 41.5 +/- 21 events/h). PAP adherence was higher in the proactive telemedicine group than in the control group (4.3 +/- 2.4 and 4.1 +/- 2.6 h/night; P = 0.01, respectively), and mean mask pressure at follow-up was significantly lower in the telemedicine group than in the control group (8.7 +/- 2.1 cm H2O vs. 9.2 +/- 2.5 cm H2O; P = 0.028). In post hoc analysis, the difference in PAP adherence between groups was most pronounced in patients with depression (4.8 +/- 2.6 h/night vs. 2.7 +/- 2.3 h/night; P = 0.03). Relevant mask leakage (>24 L/min) was lower in the telemedicine group (5.4% vs. 12.1%, P = 0.024). Improvement of patient-reported outcome measures and patient satisfaction was equivalent between groups. Conclusions: Proactive telemedical management of the initial follow-up of PAP treatment compared favorably with conventional follow-up in terms of adherence, pressure level, and mask leakage. Patients with depression may particularly benefit from telemedical follow-up. Specific clinical routines are required to establish this practice in sleep clinics.
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| 8. |
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| 9. |
- Grote, Ludger, 1964, et al.
(författare)
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Oximeter-based autonomic state indicator algorithm for cardiovascular risk assessment.
- 2011
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Ingår i: Chest. - : Elsevier BV. - 1931-3543 .- 0012-3692. ; 139:2, s. 253-259
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Tidskriftsartikel (refereegranskat)abstract
- Background: Cardiovascular (CV) risk assessment is important in clinical practice. An autonomic state indicator (ASI) algorithm based on pulse oximetry was developed and validated for CV risk assessment. Methods: One hundred forty-eight sleep clinic patients (98 men, mean age 50 ± 13 years) underwent an overnight study using a novel photoplethysmographic sensor. CV risk was classified according to the European Society of Hypertension/European Society of Cardiology (ESH/ESC) risk factor matrix. Five signal components reflecting cardiac and vascular activity (pulse wave attenuation, pulse rate acceleration, pulse propagation time, respiration-related pulse oscillation, and oxygen desaturation) extracted from 99 randomly selected subjects were used to train the classification algorithm. The capacity of the algorithm for CV risk prediction was validated in 49 additional patients. Results: Each signal component contributed independently to CV risk prediction. The sensitivity and specificity of the algorithm to distinguish high/low CV risk in the validation group were 80% and 77%, respectively. The area under the receiver operating characteristic curve for high CV risk classification was 0.84. β-Blocker treatment was identified as an important factor for classification that was not in line with the ESH/ESC reference matrix. Conclusions: Signals derived from overnight oximetry recording provide a novel potential tool for CV risk classification. Prospective studies are warranted to establish the value of the ASI algorithm for prediction of outcome in CV disease.
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| 10. |
- Grote, Ludger, 1964, et al.
(författare)
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Pulse Wave Analysis During Sleep
- 2017
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Ingår i: Principles and Practice of Sleep Medicine. Meir H. Kryger & Thomas Roth & William C. Dement (eds.). - : Elsevier. - 9780323242882
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Bokkapitel (refereegranskat)
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