{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,13]],"date-time":"2026-10-13T00:02:36Z","timestamp":1791849756708,"version":"4.3.4"},"reference-count":39,"publisher":"Oxford University Press (OUP)","issue":"4","license":[{"start":{"date-parts":[[2011,8,4]],"date-time":"2011-08-04T00:00:00Z","timestamp":1312416000000},"content-version":"vor","delay-in-days":34,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Journal of Occupational Health"],"published-print":{"date-parts":[[2011,7]]},"abstract":"<jats:sec><jats:label\/><jats:p><jats:bold>Brief Morning Exposure to Bright Light Improves Subjective Symptoms and Performance in Nurses with Rapidly Rotating Shifts: Katsutoshi Tanaka, et al. Department of Occupational Mental Health, Graduate School of Medical Sciences, Kitasato University\u2014<\/jats:bold><\/jats:p><\/jats:sec><jats:sec><jats:title>Objective<\/jats:title><jats:p>To investigate whether or not brief bright light (BL) exposure on workday mornings can improve health, performance and safety in nurses with rapidly rotating shifts.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>We conducted a randomized crossover study involving registered nurses at a teaching hospital working a two\u2010shift system including the night shift. Participants were instructed to expose themselves to BL for 10 min on workday mornings.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>A total of 61 participants were enrolled in the present study. Thirty\u2010one participants Received BL exposure in the irst month, and the other 30 Received it in the second month. Significant improvements were noted in the BL periods compared with the non\u2010BL periods for self\u2010assessed sleepiness at 10:00 on day\u2010shift days evaluated using the Karolinska Sleepiness Scale, self\u2010assessment of night sleep for day\u2010shift days using the Visual Analogue Scale and for fatigue assessed using the Checklist Individual Strength Questionnaire. The estimated mean difference for each scale (95% conidence interval) was \u20130.55 (\u20130.91, \u20130.20), 0.37 (0.04, 0.70) and \u20132.13 (\u20133.78, \u20130.48), respectively. Mean response time evaluated using the psychomotor vigilance task test (PVT) showed significant improvement in the BL periods compared with the non\u2010BL periods. No statistically significant differences were observed for sleepiness at 14:00, depression, number of PVT lapses or frequency of perceived adverse events and near misses.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>Our indings suggest that brief BL exposure on mornings preceding a day shift is effective in improving sleepiness and performance during day\u2010shift work, subjective nighttime sleep on day\u2010shift days, and perceived fatigue for the preceding two weeks in rapidly rotating shift nurses.<\/jats:p><\/jats:sec>","DOI":"10.1539\/joh.l10118","type":"journal-article","created":{"date-parts":[[2011,5,18]],"date-time":"2011-05-18T05:20:23Z","timestamp":1305696023000},"page":"258-266","source":"Crossref","is-referenced-by-count":37,"title":["Brief Morning Exposure to Bright Light Improves Subjective Symptoms and Performance in Nurses with Rapidly Rotating 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