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Résumé (français)

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Résumé (anglais)

Prior research has demonstrated that work stress negatively impacts sleep, but the role of sleep as an antecedent of work stress has received little attention despite emerging research on sleep as a predictor of diverse work outcomes. We hypothesize lagged, reciprocal and negative relationships between work stress (high job demands, low job control, and low social support) and sleep (quantity and quality). Hypotheses were tested using a subsample (N= 2871) of over 17,000 randomly-selected employed Canadians across five cycles (2002- 2010) of the National Population Health Survey. Using MPlus Version 6, cross- lagged analyses showed that sleep predicted subsequent work stress across a two-year time lag over all five time periods. In contrast, the effects of work stress on subsequent sleep approached significance over the same time periods. These differential findings point to the importance of considering the nature of the predictor-outcome relationship when positing specific time lags. Conceptual, methodological and practical implications are discussed.