Validation of the Japanese version of the Sleep Hygiene Practice Scale

• Published in: Sleep medicine 2021-04, Vol.80, p.204-209
• Main Authors: Hara, Shintaro, Nonaka, Shunsuke, Ishii, Miho, Ogawa, Yuko, Yang, Chien-Ming, Okajima, Isa
• Format: Article
• Language: English
• Subjects: Cognitive behavioral therapy for insomnia; Cross-sectional survey; Insomnia; Sleep hygiene; Sleep hygiene practice scale
• ISSN: 1389-9457; 1878-5506
• DOI: 10.1016/j.sleep.2021.01.047

This study sought to validate the Japanese version of the Sleep Hygiene Practices Scale (SHPS-J). A cross-sectional questionnaire-based study was conducted via the internet. In total, 854 participants (435 men, 419 women; mean age, 42.91 ± 11.54 years) were asked to complete all scales, and 283 of them were asked to complete the same scales two weeks later. The survey consisted of the SHPS-J, the Japanese version of the Insomnia Severity Index (ISI-J), and the Japanese version of the Pittsburgh Sleep Quality Index (PSQI-J). The SHPS-J was developed according to the International Society for Pharmacoeconomics and Outcomes Research Task Force for Translation and Cultural Adaption. For the analysis, participants were divided into three groups: insomnia syndrome, insomnia symptoms, and good sleep groups. The SHPS-J had good test-retest reliability (ICC: 0.55–0.76) and adequate internal consistency (α = 0.54–0.74), except with regard to eating/drinking behaviors. The factorial validity of the four-factor structure was confirmed through a confirmatory factor analysis; however, one item related to eating/drinking behaviors had no significant factor loading. The construct validity was confirmed through a correlation analysis between each domain of the SHPS-J and ISI-J (r = 0.19–0.60, p