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Association between sleep and fatigue in nurses who are engaged in 16 h night shifts in Japan: Assessment using actigraphy
Author(s) -
Kagamiyama Hiromi,
Sumi Naomi,
Yoshida Yuko,
Sugimura Naotaka,
Nemoto Fumie,
Yano Rika
Publication year - 2019
Publication title -
japan journal of nursing science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.363
H-Index - 17
eISSN - 1742-7924
pISSN - 1742-7932
DOI - 10.1111/jjns.12246
Subject(s) - actigraphy , morning , sleep (system call) , sleep diary , medicine , shift work , physical therapy , insomnia , psychology , psychiatry , computer science , operating system
Aim To determine the association between sleep and fatigue in nurses who are working in a two‐shift system, including 16 h night shifts. Methods Sixty‐one nurses were assessed on their sleeping and napping over 9 days, using actigraphy and a sleep diary. Work‐related feelings of fatigue were measured by using the “Jikaku‐sho shirabe” questionnaire and the Cumulative Fatigue Symptoms Index. Results The main night‐time sleep started after 00:00 hours in half of the participants and the average start and end times were significantly delayed among the participants in their 20s, compared to those in their 40s . Although ~90% of the participants napped during and/or after a night shift, only 50.8% napped for >2 h during their shift and 32.8% napped in the morning after a night shift. In the high‐fatigue group, significantly more nurses went to sleep after 00:25 hours than before 00:26 hours the night after a night shift. Furthermore, those nurses who napped for >2 h during their night shift exhibited a significantly lower rate of some cumulative fatigue symptoms, compared to those who did not. In addition, a combination of napping in the morning after a night shift and beginning the following night‐time sleep before 00:26 hours were associated with a significant decrease in fatigue symptoms. Conclusions Naps at an appropriate time and of an appropriate duration, along with the practice of beginning the night‐time sleep early after a night shift, might relieve cumulative mental fatigue in nurses who are working 16 h night shifts.