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This study determined the association of sleep duration with both underweight and obesity in Chinese older adults.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>This cross\u2010sectional secondary data analysis was conducted using data from the 2018 wave of the Chinese Longitudinal Healthy Longevity Survey. There were 13\u2009917 participants aged 65 and above in the analysis. Body mass index (BMI) was categorized into underweight, normal weight and overweight, and obesity. Self\u2010reported sleep duration was divided into short, normal, and long sleep duration. Logistic regression models were used to examine the association of sleep duration with underweight and obesity.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The prevalence of underweight was 16.7% and the prevalence of obesity was 8.0% in Chinese older adults aged 65 and older. Compared to the normal sleep duration group, the short sleep duration group had a higher incidence of underweight (AOR\u00a0=\u00a01.29, 95% CI: 1.01\u20131.65), and the long sleep duration group showed a higher incidence of obesity (AOR\u00a0=\u00a01.57, 95% CI: 1.07\u20132.30) in older men. A greater incidence of underweight was found in the short sleep duration group (AOR\u00a0=\u00a01.19, 95% CI: 1.02\u20131.40) in old\u2010old adults after adjusting for covariates.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Short sleep duration is associated with being underweight and long sleep duration is linked with obesity in older men. Short sleep duration is also a risk factor for the underweight of old\u2010old adults.<\/jats:p><\/jats:sec>","DOI":"10.1002\/ajhb.23836","type":"journal-article","created":{"date-parts":[[2022,11,17]],"date-time":"2022-11-17T14:39:26Z","timestamp":1668695966000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Association of sleep duration with underweight and obesity in older adults: A cross\u2010sectional study of the Chinese longitudinal healthy longevity survey"],"prefix":"10.1002","volume":"35","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4347-5885","authenticated-orcid":false,"given":"Xiaoguang","family":"Zhao","sequence":"first","affiliation":[{"name":"Research Academy of Grand Health Ningbo University  Ningbo Zhejiang China"},{"name":"Faculty of Sport Science Ningbo University  Ningbo Zhejiang China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jiabin","family":"Yu","sequence":"additional","affiliation":[{"name":"Research Academy of Grand Health Ningbo University  Ningbo Zhejiang China"},{"name":"Faculty of Sport Science Ningbo University  Ningbo Zhejiang China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fei","family":"Hu","sequence":"additional","affiliation":[{"name":"Faculty of Sport Science Ningbo University  Ningbo Zhejiang China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Siyuan","family":"Chen","sequence":"additional","affiliation":[{"name":"Faculty of Sport Science Ningbo University  Ningbo Zhejiang China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nan","family":"Liu","sequence":"additional","affiliation":[{"name":"Faculty of Sport Science Ningbo University  Ningbo Zhejiang China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2022,11,17]]},"reference":[{"key":"e_1_2_11_2_1","doi-asserted-by":"publisher","DOI":"10.4103\/jfmpc.jfmpc_1824_21"},{"key":"e_1_2_11_3_1","doi-asserted-by":"publisher","DOI":"10.1111\/ggi.13962"},{"key":"e_1_2_11_4_1","doi-asserted-by":"publisher","DOI":"10.1186\/s12877-021-02278-8"},{"key":"e_1_2_11_5_1","doi-asserted-by":"publisher","DOI":"10.3390\/ijerph19148457"},{"key":"e_1_2_11_6_1","first-page":"1","article-title":"The guidelines for prevention and control of overweight and obesity in Chinese adults","volume":"17","author":"Chen C.","year":"2004","journal-title":"Biomedical and Environmental Sciences"},{"key":"e_1_2_11_7_1","volume-title":"Data quality assessment for the 2018 wave of the Chinese longitudinal healthy longevity survey","author":"Chen H.","year":"2021"},{"key":"e_1_2_11_8_1","doi-asserted-by":"publisher","DOI":"10.1007\/s12603-017-0942-z"},{"key":"e_1_2_11_9_1","doi-asserted-by":"publisher","DOI":"10.3945\/an.115.008623"},{"key":"e_1_2_11_10_1","doi-asserted-by":"publisher","DOI":"10.1186\/s12877-018-0889-x"},{"key":"e_1_2_11_11_1","doi-asserted-by":"publisher","DOI":"10.3390\/ijerph17061962"},{"key":"e_1_2_11_12_1","doi-asserted-by":"publisher","DOI":"10.1097\/HJH.0b013e32835465e5"},{"key":"e_1_2_11_13_1","first-page":"1","article-title":"Excess deaths associated with underweight, overweight, and obesity: An evaluation of potential bias","volume":"42","author":"Flegal K. 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