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  • Title: Association between sleep and fatigue in nurses who are engaged in 16 h night shifts in Japan: Assessment using actigraphy.
    Author: Kagamiyama H, Sumi N, Yoshida Y, Sugimura N, Nemoto F, Yano R.
    Journal: Jpn J Nurs Sci; 2019 Oct; 16(4):373-384. PubMed ID: 30585410.
    Abstract:
    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.
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