{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,21]],"date-time":"2026-08-21T16:43:32Z","timestamp":1787330612252,"version":"build-2736575974"},"reference-count":36,"publisher":"MDPI AG","issue":"8","license":[{"start":{"date-parts":[[2026,8,21]],"date-time":"2026-08-21T00:00:00Z","timestamp":1787270400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Behav. Sci.","Behavioral Sciences"],"abstract":"<jats:p>Background: Depressive symptoms have become a significant public health issue faced by middle-aged and older adults in China. Although previous studies have primarily focused on demographic and socioeconomic factors, the association between modifiable lifestyle behaviors and depressive symptoms still requires further investigation. Objective: To examine the associations between sleep duration, physical activity, digital participation, social participation, and depressive symptoms as well as life satisfaction among middle-aged and older adults in China. Methods: A cross-sectional analysis was conducted using data from the 2020 China Health and Retirement Longitudinal Survey (CHARLS). Depressive symptoms were defined as CES-D-10 scores \u226510, with 13,576 individuals included in the analysis sample. Adjusted prevalence ratios (aPRs) were estimated using modified Poisson regression, while ordinal logistic regression was employed to analyze life satisfaction. The analysis controlled for covariates such as demographics, socioeconomic status, and health status, and accounted for the complex sampling design. Results: The weighted prevalence of depressive symptoms was 44.5%. Sleep deprivation (&lt;7 h\/day) was significantly associated with elevated depressive symptoms (aPR = 1.49, 95% CI: 1.33\u20131.68); participation in recreational activities was significantly associated with reduced depressive symptoms (aPR = 0.86, 95% CI: 0.77\u20130.96); adequate physical activity was associated with a higher prevalence of elevated depressive symptoms (aPR = 1.17, 95% CI: 1.04\u20131.32); watching videos (aPR = 0.87, 95% CI: 0.76\u20130.99) and playing online games (aPR = 0.65, 95% CI: 0.50\u20130.83) were significantly associated with reduced depressive symptoms; and overall internet use was correlated with lower life satisfaction (OR = 0.90, 95% CI: 0.81\u20131.00). Women, rural residents, and low-income groups exhibited higher prevalence of elevated depressive symptoms. Conclusion: Sleep deprivation, as well as different types of social engagement, physical activity, and digital behavior, exhibit distinct associations with depressive symptoms in middle-aged and older adults. Behavioral intervention strategies targeting sleep hygiene, leisure activities, and tailored digital behaviors warrant further attention.<\/jats:p>","DOI":"10.3390\/bs16081455","type":"journal-article","created":{"date-parts":[[2026,8,21]],"date-time":"2026-08-21T15:51:05Z","timestamp":1787327465000},"page":"1455","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["A Study on the Depressive Symptoms and Life Satisfaction Among Middle-Aged and Older Adults in China Based on CHARLS 2020 Data"],"prefix":"10.3390","volume":"16","author":[{"given":"Shu","family":"Wang","sequence":"first","affiliation":[{"name":"Department of Global Health Research, Graduate School of Medicine, Juntendo University, Tokyo 113-8421, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8600-6638","authenticated-orcid":false,"given":"Yoshihisa","family":"Shirayama","sequence":"additional","affiliation":[{"name":"Department of Global Health Research, Graduate School of Medicine, Juntendo University, Tokyo 113-8421, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0463-847X","authenticated-orcid":false,"given":"Ishtiaq","family":"Ahmad","sequence":"additional","affiliation":[{"name":"Department of Global Health Research, Graduate School of Medicine, Juntendo University, Tokyo 113-8421, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7470-4313","authenticated-orcid":false,"given":"Miyoko","family":"Okamoto","sequence":"additional","affiliation":[{"name":"Department of Global Health Research, Graduate School of Medicine, Juntendo University, Tokyo 113-8421, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2132-7275","authenticated-orcid":false,"given":"Motoyuki","family":"Yuasa","sequence":"additional","affiliation":[{"name":"Department of Global Health Research, Graduate School of Medicine, Juntendo University, Tokyo 113-8421, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,8,21]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"e41643","DOI":"10.2196\/41643","article-title":"Internet-based behavioral activation for depression: Systematic review and meta-analysis","volume":"25","author":"Alber","year":"2023","journal-title":"Journal of Medical Internet Research"},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Ates Bulut, E., Kaya, D., Aydin, A. 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