ArticleCOPD2020
Sleep Quality and Nocturnal Symptoms in a Community-Based COPD Cohort.
Article in COPD, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers, 2 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
16 citing papers in PubMed, 2 syntheses or guidelines pooled it, 28 citations in OpenAlex.
- What is the most effective non-pharmacological treatment for poor sleep quality in Chronic obstructive pulmonary disease patients? a systematic review.Sleep & breathing = Schlaf & Atmung · 2026Pooled it
- A Systematic Literature Review of the Humanistic Burden of COPD.International journal of chronic obstructive pulmonary diseasePooled it
- Association of obstructive airway disease with COMISA: findings from the Turkish sleep apnea database (TURKAPNE) cohort.Sleep & breathing = Schlaf & Atmung · 2026Observational
- Silent Nights, Restless Lungs: Sleep Quality and Associated Factors Among COPD Patients in Vietnam - A Cross-Sectional Study.Chronic obstructive pulmonary diseases (Miami, Fla.) · 2026Article
- Prevalence and Associated Factors of Poor Sleep Quality Among adults in Qatar.Nature and science of sleep · 2026Article
- Machine learning model based on survey assessment of sleep quality in chronic obstructive pulmonary disease patients.PloS one · 2025Article
- Latent profiles and influencing factors of sleep quality in patients with chronic obstructive pulmonary disease.Frontiers in medicine · 2025Article
- Article
- Differences in quality-of-life scores across injury categories by mental health status among injured U.S. military service members and veterans.Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation · 2023Article
- The Overlap Syndrome of Obstructive Sleep Apnea and Chronic Obstructive Pulmonary Disease: A Systematic Review.Biomedicines · 2022Review
- Patient-Reported Outcome Measurements in Patients with COPD-Obstructive Sleep Apnea Overlap Syndrome: Time for Action?Journal of personalized medicine · 2022Review
- The Burden of Nocturnal Symptoms in Patients with Chronic Obstructive Pulmonary Disease: Results of a Real-World Survey in the USA.Pulmonary therapy · 2022Article
- The Relationship between Oxidative Stress and Subjective Sleep Quality in People with Coronary Artery Disease.Brain sciences · 2022Article
- Article
- Investigation on the Relationship between Sleep Quality and Depression and Anxiety in Hospitalized Patients with Different Levels of AECOPD.Computational and mathematical methods in medicine · 2022Article
- Questionnaire Survey-Based Quantitative Assessment of the Impact of Transitional Care on Self-Management of Patients with Acute Exacerbation of Chronic Obstructive Pulmonary Disease.Computational and mathematical methods in medicine · 2021Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
8 authors at 5 institutions in 2 countries.
Funding
Abstract
Small studies have suggested that patients with chronic obstructive pulmonary disease (COPD) have poor sleep quality. Our aim was to examine the prevalence of subjective sleep-related complaints and predictors of poor sleep quality in a large community-based COPD cohort. We analyzed cross-sectional data on sleep questionnaire responses from the Canadian Cohort of Obstructive Lung Disease (CanCOLD) study, a population-based, prospective longitudinal cohort study across Canada. The cohort comprises a COPD group and two matched non-COPD (never-smokers and ever-smokers) groups. Sleep-related symptoms were assessed using questionnaires including Pittsburgh Sleep Quality Index (PSQI). A total score of PSQI > 5 is indicative of poor sleep quality. Health-related quality of life measures and the presence of mood disturbance were assessed using Short Form-36™ Health Survey (SF-36) multi-item questionnaires and Hospital Anxiety and Depression Scale (HADS), respectively. Predictors of poor sleep quality were analyzed using multivariable logistic regression analysis. Of the 1123 subjects, 263 were healthy controls, 323 at-risk controls, and 537 had COPD (297 had mild, 240 with moderate to severe disease). The mean PSQI score was not significantly different between groups. COPD patients with poor sleep quality had lower diffusion capacity, higher HADS anxiety and depression scores and lower SF-36 mental and physical component summary scores than COPD patients classified as good sleepers. The presence of restless legs and obstructive sleep apnea symptoms, waist circumference, predicted diffusion capacity and HADS anxiety and depression scores were identified as independent predictors of poor sleep quality.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.