0000000000147844
AUTHOR
Sophia E. Schiza
showing 15 related works from this author
Is kidney a new organ target in patients with obstructive sleep apnea? Research priorities in a rapidly evolving field.
2021
Abstract The bidirectional relationship between sleep disordered breathing and chronic kidney disease (CKD) has recently gained a lot of interest. Several lines of evidence suggest the high prevalence of coexistent obstructive sleep apnea (OSA) in patients with CKD and end-stage renal disease (ESRD). In addition, OSA seems to result in loss of kidney function in some patients, especially in those with cardio-metabolic comorbidities. Treatment of CKD/ESRD and OSA can alter the natural history of each other; still better phenotyping with selection of appropriate treatment approaches is urgently needed. The aim of this narrative review is to provide an update of recent studies on epidemiologic…
Clinical presentation of patients with suspected obstructive sleep apnea and self-reported physician-diagnosed asthma in the ESADA cohort.
2018
Obstructive sleep apnea (OSA) and asthma are often associated and several studies suggest a bidirectional relationship between asthma and OSA. This study analyzed the characteristics of patients with suspected OSA from the European Sleep Apnea Database according to presence/absence of physician-diagnosed asthma. Cross-sectional data in 16,236 patients (29.1% female) referred for suspected OSA were analyzed according to occurrence of physician-diagnosed asthma for anthropometrics, OSA severity and sleepiness. Sleep structure was assessed in patients studied by polysomnography (i.e. 48% of the sample). The prevalence of physician-diagnosed asthma in the entire cohort was 4.8% (7.9% in women, …
Sleep laboratories reopening and COVID-19 : a European perspective
2021
The clinical activities regarding sleep disordered breathing (SDB) have been sharply interrupted during the initial phase of the COVID-19 epidemic throughout Europe. In the last months, activities have gradually restarted, according to epidemiological phase of COVID-19 and National recommendations. The recent increase in cases throughout Europe obliges to reconsider management strategies of SDB accordingly. Diagnosis of SDB and initiation of treatment pose some specific problems to be addressed to preserve safety of the patients and health personnel. This perspective document by a group of European sleep experts aims at summarising some different approaches followed in Europe and United Sta…
Burden of Comorbidities in Patients with OSAS and COPD-OSAS Overlap Syndrome
2021
Background and Objectives: Obstructive sleep apnea syndrome (OSAS) and chronic obstructive pulmonary disease (COPD) are usually associated with multi-morbidity. The aim of this study was to retrospectively investigate the prevalence of comorbidities in a cohort of patients with OSAS and COPD-OSAS overlap syndrome (OS) patients and to explore differences between these two groups. Materials and Methods: Included were consecutive OS patients and OSAS patients who had been referred to our sleep laboratory, and were matched in terms of sex, age, BMI, and smoking history. Presence of comorbidities was recorded based on their medical history and after clinical and laboratory examination. Results: …
Vitamin D deficiency in patients evaluated for obstructive sleep apnea: is it associated with disease severity?
2019
Purpose: The aim of the present study was to assess vitamin D levels in a large cohort of OSA patients and to investigate possible correlations with clinical and polysomnographic parameters. Methods: In this cross-sectional study, 685 consecutive patients underwent type 1 polysomnography (PSG) for OSA diagnosis. They were grouped according to apnea–hypopnea index (AHI) as mild, moderate, and severe. Patients with AHI < 5 served as controls. Demographic, PSG data, and serum levels of vitamin D were measured and compared between groups. Results: OSA was diagnosed in 617 of the patients (90%). Of those, 94 (15%) had mild OSA, 150 (24%) moderate OSA, and 373 (61%) severe OSA. The risk of vit…
Mild obstructive sleep apnoea (OSA) and arterial hypertension in the EuropeanSleep Apnoea Database (ESADA) cohort study.
2018
Background: Mild obstructive sleep apnoea (OSA) is highly prevalent, however its association with important clinical outcomes like arterial hypertension remains unknown. Aims and Objectives: To investigate the association between mild OSA and arterial hypertension in the European Sleep Apnoea Database (ESADA) cohort after adjusting for relevant confounding factors. Methods: A multicentric sample of 4974 adults from the ESADA cohort who showed simple snoring or mild OSA at cardiorespiratory polygraphy was studied. We compared the predictive value of mild OSA (AHI 5- Results: Arterial hypertension prevalence was 37% in mild OSA patients (n=2457) compared to 20% in non-apnoeic snorers (n=2517,…
Impact of temperature on obstructive sleep apnoea in three different climate zones of Europe: Data from the European Sleep Apnoea Database (ESADA)
2021
Recent studies indicate that ambient temperature may modulate obstructive sleep apnoea (OSA) severity. However, study results are contradictory warranting more investigation in this field. We analysed 19,293 patients of the European Sleep Apnoea Database (ESADA) cohort with restriction to the three predominant climate zones according to the Koppen-Geiger climate classification: Cfb (warm temperature, fully humid, warm summer), Csa (warm temperature, summer dry, hot summer), and Dfb (snow, fully humid, warm summer). Average outside temperature values were obtained and several hierarchical regression analyses were performed to investigate the impact of temperature on the apnea-hypopnea index …
Positive airway pressure level based upper airway collapsibility classification - the European Sleep Apnea Database (ESADA)
2021
Background and objectives: Obstructive sleep apnea (OSA) patients with mild upper airway collapsibility represents a target group for potential non-positive airway pressure (PAP) treatment. We studied the clinical characteristics of this endotypic group in a large Pan-European sleep apnea registry. Methods: A retrospective analysis was performed in 2541 OSA patients with fixed PAP treatment (male 74%, age 53±11 years, body mass index [BMI] 33±6 kg/m2, apnea-hypopnea index [AHI] 41±25 events/h at baseline). Therapeutic PAP level ≤8 cm H2O was used as the cut-off to classify patients with mild upper airway collapsibility (Landry SA et al. Sleep 2017; 40:6). Results: Mean pressure of the PAP t…
Evaluation of a multicomponent grading system for obstructive sleep apnoea: the Baveno classification
2021
New findings on pathophysiology, epidemiology, and outcome have raised concerns on the relevance of the apnoea–hypopnoea index (AHI) in the classification of obstructive sleep apnoea (OSA) severity. Recently, a multicomponent grading system decision integrating symptomatology and comorbidities (Baveno classification), was proposed to characterise OSA and to guide therapeutic decisions. We evaluated whether this system reflects the OSA population, whether it translates into differences in outcomes, and whether the addition of AHI improves the scheme. A total of 14 499 OSA patients from the European Sleep Apnoea Database cohort were analysed. The groups were homogeneously distributed and were…
Metabolic Syndrome in Patients with Coexistent Obstructive Sleep Apnea Syndrome and Chronic Obstructive Pulmonary Disease (Overlap Syndrome).
2020
Background: Evidence suggests that metabolic syndrome (MetS) is highly prevalent in patients with obstructive sleep apnea syndrome (OSAS) and chronic obstructive pulmonary disease (COPD). However, ...
Unique sleep-stage transitions determined by obstructive sleep apnea severity, age and gender
2019
In obstructive sleep apnea, patients' sleep is fragmented leading to excessive daytime sleepiness and co-morbidities like arterial hypertension. However, traditional metrics are not always directly correlated with daytime sleepiness, and the association between traditional sleep quality metrics like sleep duration and arterial hypertension is still ambiguous. In a development cohort, we analysed hypnograms from mild (n = 213), moderate (n = 235) and severe (n = 277) obstructive sleep apnea patients as well as healthy controls (n = 105) from the European Sleep Apnea Database. We assessed sleep by the analysis of two-step transitions depending on obstructive sleep apnea severity and anthropom…
Continuous professional development: Elevating sleep and breathing disorder education in europe
2020
Sleep and breathing disorders are highly prevalent, representing a growing subspecialty of respiratory medicine. The term sleep disordered breathing (SDB) encompasses a range of conditions characterised by abnormal breathing during sleep, from chronic or habitual snoring, to frank obstructive sleep apnoea (OSA) or, in some cases, central sleep apnoea (CSA) and hypoventilation syndromes. OSA is the commonest form of SDB, leading to many potential consequences and adverse clinical outcomes, including excessive daytime sleepiness, impaired daytime function, metabolic dysfunction, and an increased risk of cardiovascular disease and mortality [1]. The estimated reported prevalence of moderate-to…
Mild OSA and arterial hypertension in the European Sleep Apnoea Database cohort study
2019
Background: Mild obstructive sleep apnoea (OSA) is highly prevalent; however its association with important clinical outcomes like arterial hypertension remains unknown. Aims: To investigate the association between mild OSA and hypertension in the European Sleep Apnoea Database (ESADA) cohort after adjusting for relevant confounding factors. Methods: A multicentric sample of 7995 adults from the ESADA cohort with simple snoring or mild OSA at PG or PSG was studied. We compared the predictive value of mild OSA (AHI 5- Results: Arterial hypertension prevalence was 37% in mild OSA (n=1566) compared to 22% in non-apnoeic snorers (n=793, p Conclusion: Our results suppport the hypothesis that mi…
Effects of sleep apnea and kidney dysfunction on objective sleep quality in nondialyzed patients with chronic kidney disease: an ESADA study
2020
Study Objectives: Patients with chronic kidney disease (CKD) often report poor sleep quality, but they commonly exhibit OSA. The aim of this study was to evaluate the influence of OSA severity and of estimated glomerular filtration rate impairment on objective sleep quality in nondialyzed patients with CKD, defined as an estimated glomerular filtration rate <60 mL/min/1.73m2. Methods: Polysomnographic sleep characteristics were compared between patients with (n = 430) and without CKD (n = 6,639) in the European Sleep Apnea Database cohort. Comparisons were repeated in 375 patients with CKD and 375 control patients without CKD matched for sleep center, age, sex, and AHI, and in 310 matche…
Cardiometabolic impact and symptom profile of obstructivesleep apnea: does gender matter?
2019
European-Respiratory-Society (ERS) International Congress -- SEP 28-OCT 02, 2019 -- Madrid, SPAIN