Empirical study on shift from 16-hour night shift work to 12-hour night shift work in nurses

Research Project

Project/Area Number	25670912
Research Category	Grant-in-Aid for Challenging Exploratory Research
Allocation Type	Multi-year Fund
Research Field	Fundamental nursing
Research Institution	Hiroshima University (2016) Prefectural University of Hiroshima (2013-2015)
Principal Investigator	Oriyama Sanae 広島大学, 医歯薬保健学研究院(保), 教授 (20457203)
Co-Investigator(Renkei-kenkyūsha)	MIYAKOSHI YUKIKO 日本福祉大学, 看護学部看護学科, 教授 (10157620) KOBAYASHI TOSHIO 広島大学, 大学院医歯薬保健学研究院(保), 教授 (20251069)
Project Period (FY)	2013-04-01 – 2017-03-31
Project Status	Completed (Fiscal Year 2016)
Budget Amount *help	¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000) Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000) Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000) Fiscal Year 2013: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords	交代制勤務 / 看護師 / 12時間交代制 / 疲労 / 眠気 / 16時間夜勤 / 12時間交代制勤務 / 長日勤 / 夜勤 / 12時間夜勤 / 作業量 / 睡眠 / 仮眠
Outline of Final Research Achievements	We clarified resting and resting situations and changes in sleepiness and fatigue for 12-hour night shift workers in nurses.Twelve-hour nightshift workers took naps at a higher frequency and had longer nap times before night shifts than 16-hour nightshift workers.Twelve-hour nightshift workers endure greater physical strain during day shifts compared with that during long day shifts. Furthermore, in long day shifts, sleepiness and fatigue increased after 17:00. In night shifts, sleepiness, fatigue, and discomfort increased during rest periods. Therefore, due care should be provided for a decreased arousal level after rest periods. As stated above, we think that it is important to reduce fatigue after 17:00 on long day shift, in order to smoothly shift from 16-night shift to 12-hour night shift work.