Employment type, workplace interpersonal conflict, and insomnia: a cross-sectional study of 37,646 employees in Japan.
Sakurai-K; Nakata-A; Ikeda-T; Otsuka-Y; Kawahito-J
Arch Environ Occup Health 2014 Jan-Mar; 69(1):23-32
This study explored whether workplace interpersonal conflict (WIC) is associated with insomnia, and whether the relationship between WIC and insomnia differs across different employment groups. A total of 37,646 Japanese full-time employees participated in a cross-sectional survey. Employment types included permanent employment and 2 forms of temporary employment: direct-hire and temporary work agent (TWA). Insomnia symptoms, including difficulty initiating sleep, difficulty maintaining sleep, and early morning awakening were measured. Insomnia was defined as having experienced 1 or more of these symptoms on >/= 3 nights per week over the past 12 months. Results showed that WIC was significantly associated with an increased risk of insomnia (odds ratio OR = 1.63; 95% confidence interval CI = 1.55-1.71), controlling for confounders. However, the relationship between WIC and the risk of insomnia was significantly stronger for TWAs than for permanent employees (OR = 1.97; 95% CI = 1.13-3.45). A frequent exposure to WIC may increase the risk of insomnia, particularly for TWAs.
Sleep-disorders; Sleep-deprivation; Workplace-studies; Work-operations; Work-organization; Work-performance; Worker-health; Behavior; Mental-processes; Occupations; Health-surveys; Employees; Employee-health; Job-stress; Epidemiology; Risk-factors;
Author Keywords: employment status; epidemiology; insomnia; Japan; sleep; workplace interpersonal
Aknori Nakata, PhD, School of Health Sciences, University of Occupational and Environmental Health, 1-1 Isegaoka, Yahatanishiku, Kitakyushu, Fukuoka 807-8555, Japan
Archives of Environmental & Occupational Health