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- Title
BMI and Medically Certified Long-Term Sickness Absence Among Japanese Employees.
- Authors
Endo, Motoki; Inoue, Yosuke; Kuwahara, Keisuke; Nishiura, Chihiro; Hori, Ai; Ogasawara, Takayuki; Yamaguchi, Miwa; Nakagawa, Tohru; Honda, Toru; Yamamoto, Shuichiro; Okazaki, Hiroko; Imai, Teppei; Nishihara, Akiko; Miyamoto, Toshiaki; Sasaki, Naoko; Uehara, Akihiko; Yamamoto, Makoto; Murakami, Taizo; Shimizu, Makiko; Eguchi, Masafumi
- Abstract
<bold>Objective: </bold>In contrast to the association between excess weight and sickness absence (SA), the association in relation to underweight has been under-researched. This study aimed to examine the effects of BMI at both extremes of its distribution on SA.<bold>Methods: </bold>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 on medically certified long-term SA (LTSA) (i.e., SA lasting ≥ 30 consecutive days) from April 2012 to March 2017. A sex-specific Cox proportional hazards model was used to investigate the associations.<bold>Results: </bold>Among males, both obesity (hazard ratio [HR] = 1.81, 95% CI: 1.50-2.17) and underweight (HR = 1.56, 95% CI: 1.23-1.96) were significantly associated with LTSA compared with normal weight. This U-shaped 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 = 1.54, 95% CI: 1.16-2.05).<bold>Conclusions: </bold>In a cohort of the Japanese working-age population, both obesity and underweight were associated with a greater risk of LTSA in males. Future research should not overlook the excess risk of LTSA associated with underweight.
- Subjects
JAPAN; PROPORTIONAL hazards models; DISEASES; MENTAL illness; INDUSTRIAL hygiene; SICK leave; OBESITY; RESEARCH; WORK; RESEARCH methodology; EVALUATION research; MEDICAL cooperation; LEANNESS; COMPARATIVE studies; RESEARCH funding; BODY mass index; LONGITUDINAL method
- Publication
Obesity (19307381), 2020, Vol 28, Issue 2, p437
- ISSN
1930-7381
- Publication type
journal article
- DOI
10.1002/oby.22703