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Po-Chang Tseng,1,2 Ping-Yi Lin,3,4 Wen-Miin Liang,5 Wen-Yu Lin,1,6 Hsien-Wen Kuo1,7 1Institute of Environmental and Occupational Health Sciences, National Yang Ming Chao Tung University, Taipei, Taiwan; 2Health Promotion Administration, Ministry of Health and Welfare, Taipei, Taiwan; 3Department of Nursing, Hungkuang University, Taichung, Taiwan; 4Department of Medical Research, China Medical University Hospital, Taichung, Taiwan; 5Department of Health Services Administration, China Medical University, Taichung, Taiwan; 6Environmental Protection Administration, Executive Yuan, Taipei, Taiwan; 7Institute of Public Health, National Defense University, Taipei, TaiwanCorrespondence: Hsien-Wen Kuo, Institute of Environmental and Occupational Health Sciences, National Yang Ming Chiao Tung University, No. 155, Sec.2, Linong Street, Taipei, 112, Taiwan, Tel +886 2-28272294, Fax +886 2-28278254, Email hwkuo@ym.edu.twObjective: Evidence indicated that shift work is a contributing factor to risk of obesity and leads to cardiovascular diseases (CVDs), but few researches have examined the moderating effects of job demand and contingent work schedule on overweight and obesity. Thus, we assessed the modification effect of contingent work schedules and job demand on overweight and obesity among Taiwan’s civil servants.Methods: Multistage stratified random cluster sampling was used based on a proportional probabilistic sampling (PPS) in a national survey for civil servants. A total of 20,046 participants from 647 registered governmental institutions were enrolled and anonymously and voluntarily filled out web-based questionnaires.Results: Compared to fixed work schedule, odd ratios (ORs) of obesity and overweight were 1.63 and 1.78 times in contingent work schedule, respectively. In addition, the modification effects of contingent work schedule and high job demand on overweight and obesity with Rothman’s synergy index were 2.43 and 2.56, respectively. Using a hierarchical regres

Po-Chang Tseng,1,2 Ping-Yi Lin,3,4 Wen-Miin Liang,5 Wen-Yu Lin,1,6 Hsien-Wen Kuo1,7 1Institute of Environmental and Occupational Health Sciences, National Yang Ming Chiao Tung University, Taipei, Taiwan; 2Health Promotion Administration, Ministry of Health and Welfare, Taipei, Taiwan; 3Department of Nursing, Hungkuang University, Taichung, Taiwan; 4Department of Medical Research, China Medical University Hospital, Taichung, Taiwan; 5Department of Health Services Administration, China Medical University, Taichung, Taiwan; 6Environmental Protection Administration, Executive Yuan, Taipei, Taiwan; 7Institute of Public Health, National Defense University, Taipei, TaiwanCorrespondence: Hsien-Wen KuoInstitute of Environmental and Occupational Health Sciences, National Yang Ming Chiao Tung University, No. 155, Sec.2, Linong Street, Taipei, 112, TaiwanTel +886 2-28272294Email hwkuo@ym.edu.twAim: Occupational strain is recognized as a risk for arthritis, yet little is known about how psychological stress affects arthritis moderated by sleep duration. The objective of this study is to assess work-related stress using the effort-reward imbalance (ERI) model and the job-demand-support (JDS) model on arthritis moderated by sleep duration.Methods: A nationwide cross-sectional study randomly collected a total of 11,875 middle-aged, employed civil servants from 647 registered governmental institutions. Each participant anonymously and voluntarily filled out a web-based questionnaire and informed consent at the time of the study. Psychosocial work stress was assessed by ERI and JDS measured by a Chinese version of the job content questionnaire.Results: There were significant odds ratios (ORs) of arthritis positively associated with high ERI (OR = 1.58), high overcommitment (OC) (OR = 1.57), and job demand (OR = 1.31) and negatively associated with job support (OR = 0.69) using multivariate analysis after being adjusted for covariates. For the short sleep duration group, there was an