Abstract
ObjectivesTo estimate the relationship between sleep quality and depression, among Han and Manchu ethnicities, in a rural Chinese population.MethodsA sample of 8,888 adults was selected using a multistage cluster and random sampling method. Sleep quality was evaluated using the Pittsburgh Sleep Quality Index (PSQI). Depressive symptoms were assessed via the Center for Epidemiological Survey, Depression Scale (CES-D). Logistic regression was conducted to assess associations between sleep quality and depression.ResultsThe prevalence of poor sleep quality and depression in the Manchus (20.74% and 22.65%) was significantly lower than that in the Hans (29.57% and 26.25%), respectively. Depressive participants had higher odds ratios of global and all sub PSQI elements than non-depressive participants, both among the Hans and the Manchus. Additive interactions were identified between depressive symptoms and ethnicity with global and four sub-PSQI elements, including subjective sleep quality, sleep disturbance, use of sleep medication and daytime dysfunction.ConclusionsThe findings revealed that the prevalence of poor sleep quality and depression among the Hans was greater than among the Manchus. Depression was associated with higher odds of poor sleep quality.
Highlights
Worldwide, depression accounts for almost 9.6% of all total years lived with disability [1]
The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript
The findings revealed that the prevalence of poor sleep quality and depression among the Hans was greater than among the Manchus
Summary
Depression accounts for almost 9.6% of all total years lived with disability [1]. In Yu et al.’s recent populationbased study of 18,994 Chinese adults in, the prevalence of depressive symptoms was as high as 16.3% [3]. Poor sleep quality is closely linked to depression [6, 7]. Reported associations between depression and poor sleep quality have varied across study populations. Atalay et al reported no significant correlations between patients’ insomnia scores and their depressive status [8]. A meta-analysis of thirty-four cohort studies, involving 172,077 participants, reported a statistically significant association between insomnia and an increased risk of depression [9]
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