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Japan – Workplace conflict increases risk of temporary worker insomnia

10 January 2014

A study published in Japan has found that the relationship between workplace interpersonal conflict and the risk of insomnia was significantly stronger for temporary workers than for permanent employers.

The study, entitled “Employment Type, Workplace Interpersonal Conflict, and Insomnia: A Cross-sectional Study of 37,646 Employees in Japan”, explored whether workplace interpersonal conflict is associated with insomnia, and whether the relationship between the two differs across different employment groups.

Employment types included in the study included permanent employment and two forms of temporary employment: direct-hire and temporary work agent (TWA). The symptoms measures included difficulty initiating sleep, difficulty maintaining sleep, and waking early in the morning. The study defined insomnia as having one or more of these symptoms on three or more nights per week over a 12 month period.

The results of the study showed that workplace interpersonal conflict was significantly associated with an increased risk of insomnia. However, the relationship between workplace interpersonal conflict and the risk of insomnia was significantly stronger for TWAs than for permanent employees.

The study, published by Taylor & Francis Online is available for download here.        

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