{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,8]],"date-time":"2026-05-08T00:29:15Z","timestamp":1778200155195,"version":"3.51.4"},"reference-count":43,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2020,1,23]],"date-time":"2020-01-23T00:00:00Z","timestamp":1579737600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001691","name":"Japan Society for the Promotion of Science","doi-asserted-by":"publisher","award":["JSPS KAKENHI JP16H05251"],"award-info":[{"award-number":["JSPS KAKENHI JP16H05251"]}],"id":[{"id":"10.13039\/501100001691","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Obesity"],"published-print":{"date-parts":[[2020,2]]},"abstract":"<jats:sec><jats:title>Objective<\/jats:title><jats:p>In contrast to the association between excess weight and sickness absence (SA), the association in relation to underweight has been under\u2010researched. This study aimed to examine the effects of BMI at both extremes of its distribution on SA.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Data came from the Japan Epidemiology Collaboration on Occupational Health study of 77,760 workers aged 20 to 59 years (66,166 males, 11,594 females). Information was collected\u00a0on medically certified long\u2010term SA (LTSA) (i.e., SA lasting\u2009\u2265\u200930 consecutive days) from April 2012 to March 2017. A sex\u2010specific Cox proportional hazards model was used to investigate the associations.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Among males, both obesity (hazard ratio [HR]\u2009=\u20091.81, 95% CI: 1.50\u20102.17) and underweight (HR\u2009=\u20091.56, 95% CI: 1.23\u20101.96) were significantly associated with LTSA compared with normal weight. This U\u2010shaped association between BMI categories and LTSA was observed both for mental and physical disorders. Among females, an elevated risk was observed among those with overweight (HR\u2009=\u20091.54, 95% CI: 1.16\u20102.05).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>In a cohort of the Japanese working\u2010age population, both obesity and underweight were associated with a greater risk of LTSA in males. Future research should not overlook the\u00a0excess risk of LTSA associated with underweight.<\/jats:p><\/jats:sec>","DOI":"10.1002\/oby.22703","type":"journal-article","created":{"date-parts":[[2020,1,23]],"date-time":"2020-01-23T08:41:40Z","timestamp":1579768900000},"page":"437-444","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":13,"title":["BMI and Medically Certified Long\u2010Term Sickness Absence Among Japanese Employees"],"prefix":"10.1002","volume":"28","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1025-4202","authenticated-orcid":false,"given":"Motoki","family":"Endo","sequence":"first","affiliation":[{"name":"Department of Public Health Juntendo University Graduate School of Medicine Tokyo Japan"},{"name":"Department of Epidemiology and Prevention National Center for Global Health and Medicine Tokyo Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7690-3447","authenticated-orcid":false,"given":"Yosuke","family":"Inoue","sequence":"additional","affiliation":[{"name":"Department of Epidemiology and Prevention National Center for Global Health and Medicine Tokyo Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7503-1333","authenticated-orcid":false,"given":"Keisuke","family":"Kuwahara","sequence":"additional","affiliation":[{"name":"Department of Epidemiology and Prevention National Center for Global Health and Medicine Tokyo Japan"},{"name":"Graduate School of Public Health Teikyo University Tokyo Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8850-5446","authenticated-orcid":false,"given":"Chihiro","family":"Nishiura","sequence":"additional","affiliation":[{"name":"Department of Safety and Health Tokyo Gas Co., Ltd. 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