The relationship of vulnerability to stress-related insomnia, morning/evening chronotype and sleep quality in shift nurses
Date Issued
2011
Date
2011
Author(s)
Lee, Ching-Yi
Abstract
Shift work characterizes the occupational property of most nursing staff. Chronotype and insomnia vulnerability are the important psychophysiological traits of general insomniacs; however, to what extent these traits influence sleep quality of nursing staff is unknown. This study aims to investigate correlates of sleep quality among nursing staff. Besides, the roles that chronotype and insomnia vulnerability play in the sleep quality of shifting nurses are also examined.
This is a cross-sectional study. All data was collected from shift nurses at a general hospital with paper-pencil questionnaire. Chronotype preference, insomnia vulnerability and sleep quality were measured with Morning-evening questionnaire (MEQ), Ford Insomnia Response to Stress Test (FIRST), Brief Symptoms Rating Scale (BSRS-5) and Pittsburgh Sleep Quality Index (PSQI), respectively. A total of 398 questionnaires from shift nurses were collected and analyzed.
A total of 97.5% participants were female who aged from 25 to 34 years in majority. The total scores of PSQI is 7.3 in average and 70.1% (n=279) subjects had poor sleep quality in the past one month. Scores of FIRST, BSRS-4 (BSRS-5 without the item of sleep disturbance) and PSQI correlated positively. In contrast, scores of MEQ did not correlated with scores of PSQI but negatively associated with scores of FIRST and BSRS-4 instead. In the multiple regression analyses, the most important predictive variables for the total scores of PSQI were the scores of FIRST and BSRS-4 . No significant interaction effects from FIRST on the relationship between MEQ with total or sub-scale of PSQI were found.
The results suggested that in addition to night shift, higher insomnia vulnerability and emotional disturbance were crucial factors affecting sleep quality of shift nurses. Besides, no evidence indicates that insomnia vulnerability moderates the relationship between chronotype and sleep quality among shift nurses. In this study, not only the risk indicators for poor sleep quality in shift nurses were explored, but also the mechanism that chronotype influences sleep quality was examined. These findings may be applied as references for the screen, intervention or research projects that aim to prevent sleep disturbance from chronicity.
Subjects
shift work
nursing staff
sleep quality
insomnia
chronotype
insomnia vulnerability
Type
thesis
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