Predicting mood change on night shift

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Abstract
This study examined the impact of night shift on six dimensions of mood. The efficacy of a range of personality, behavioural, and social/organizational predictors of these responses was also examined. Thirty-five female student nurses were studied during their first period of night work. ANOVAs indicated that only fatigue-inertia and vigour-activity were significantly affected by night work. Multivariate profile analyses revealed that significant changes were predominantly confined to the interval between the preceding rest day (B) and the first night (N1), although vigour-activity dropped significantly between N1 and N2 and rose significantly by N5 for one group of subjects. Multiple regression analyses revealed that morningness, neuroticism, work-non-work conflict, and sleep quality between shifts predicted fatigue-inertia. Extroversion and social support from both co-workers and family predicted vigour-activity. Extroversion and social support from co-workers appeared to predict the positive affect component of vigour-activity, rather than the vigour and energy component.

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