STUDY OBJECTIVES: The present study investigated whether bright light exposure during the first half of the evening/night shift combined with light attenuation in the morning is effective in improving sleep problems in nurses undertaking rotating shift work who suffer from clinical insomnia. METHODS: This was a prospective, randomized control study. The Insomnia Severity Index (ISI) and the Hospital Anxiety Depression Scale (HADS) were used to evaluate insomnia and anxiety/depression severity, respectively. Female hospital nurses on rotating shifts during the evening or night shift with an ISI score > 14 were enrolled. Subjects in the treatment group (n = 46) were exposed to bright light at 7,000-10,000 lux for ≥ 30 minutes. Exposure was continued for at least 10 days during 2 weeks, and the subjects avoided daytime outdoor sun exposure after work by wearing dark sunglasses. Subjects in the control group (n = 46) were not exposed to bright light, but also wore sunglasses after work. Statistical analyses were performed to examine group differences and differences across treatments. RESULTS: After treatment, the treatment group showed significant improvements in the ISI score and the HADS total and subscale scores as compared with pre-treatment. The ISI, HADS, and subscales of the HADS scores were significantly improved across treatments in the treatment group as compared with the control group. CONCLUSIONS: The design of this study is easy to put into practice in the real world. This is the first study to document that a higher intensity and briefer duration of bright light exposure during the first half of the evening/night shift with a daytime darkness procedure performed in rotating shift work female nurses suffering from clinical insomnia could improve their insomnia, anxiety, and depression severity.
RCT Entities:
STUDY OBJECTIVES: The present study investigated whether bright light exposure during the first half of the evening/night shift combined with light attenuation in the morning is effective in improving sleep problems in nurses undertaking rotating shift work who suffer from clinical insomnia. METHODS: This was a prospective, randomized control study. The Insomnia Severity Index (ISI) and the Hospital Anxiety Depression Scale (HADS) were used to evaluate insomnia and anxiety/depression severity, respectively. Female hospital nurses on rotating shifts during the evening or night shift with an ISI score > 14 were enrolled. Subjects in the treatment group (n = 46) were exposed to bright light at 7,000-10,000 lux for ≥ 30 minutes. Exposure was continued for at least 10 days during 2 weeks, and the subjects avoided daytime outdoor sun exposure after work by wearing dark sunglasses. Subjects in the control group (n = 46) were not exposed to bright light, but also wore sunglasses after work. Statistical analyses were performed to examine group differences and differences across treatments. RESULTS: After treatment, the treatment group showed significant improvements in the ISI score and the HADS total and subscale scores as compared with pre-treatment. The ISI, HADS, and subscales of the HADS scores were significantly improved across treatments in the treatment group as compared with the control group. CONCLUSIONS: The design of this study is easy to put into practice in the real world. This is the first study to document that a higher intensity and briefer duration of bright light exposure during the first half of the evening/night shift with a daytime darkness procedure performed in rotating shift work female nurses suffering from clinical insomnia could improve their insomnia, anxiety, and depression severity.
Authors: Hossein Kakooei; Zahra Zamanian Ardakani; Mohammad Taghi Ayattollahi; Mortaza Karimian; Gebraeil Nasl Saraji; Ali Akbar Owji Journal: Int J Occup Saf Ergon Date: 2010
Authors: Rachel Manber; Jack D Edinger; Jenna L Gress; Melanie G San Pedro-Salcedo; Tracy F Kuo; Tasha Kalista Journal: Sleep Date: 2008-04 Impact factor: 5.849
Authors: Andrew Krystal; Maurizio Fava; Robert Rubens; Thomas Wessel; Judy Caron; Phebe Wilson; Thomas Roth; W Vaughn McCall Journal: J Clin Sleep Med Date: 2007-02-15 Impact factor: 4.062
Authors: Elizabeth M Harrison; Emily A Schmied; Alexandra P Easterling; Abigail M Yablonsky; Gena L Glickman Journal: Int J Environ Res Public Health Date: 2020-12-07 Impact factor: 3.390
Authors: Tracy E Slanger; J Valérie Gross; Andreas Pinger; Peter Morfeld; Miriam Bellinger; Anna-Lena Duhme; Rosalinde Amancay Reichardt Ortega; Giovanni Costa; Tim R Driscoll; Russell G Foster; Lin Fritschi; Mikael Sallinen; Juha Liira; Thomas C Erren Journal: Cochrane Database Syst Rev Date: 2016-08-23