Prevalence and associated factors of circadian rhythm sleep-wake disorders and insomnia among visually impaired Japanese individuals
Abstract Background Although earlier studies have demonstrated that circadian rhythm sleep-wake disorders (CRSWD) are more prevalent in visually impaired individuals, the actual prevalence of CRSWD and insomnia among the visually impaired Japanese population remains unclear. The aim of this cross-se...
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| Format: | Article |
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BMC
2021-01-01
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| Series: | BMC Public Health |
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| Online Access: | https://doi.org/10.1186/s12889-020-09993-8 |
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| author | Norihisa Tamura Taeko Sasai-Sakuma Yuko Morita Masako Okawa Shigeru Inoue Yuichi Inoue |
| author_facet | Norihisa Tamura Taeko Sasai-Sakuma Yuko Morita Masako Okawa Shigeru Inoue Yuichi Inoue |
| author_sort | Norihisa Tamura |
| collection | DOAJ |
| description | Abstract Background Although earlier studies have demonstrated that circadian rhythm sleep-wake disorders (CRSWD) are more prevalent in visually impaired individuals, the actual prevalence of CRSWD and insomnia among the visually impaired Japanese population remains unclear. The aim of this cross-sectional, telephone-based study was to estimate the prevalence of CRSWD and insomnia, and explore factors associated with CRSWD and insomnia among visually impaired Japanese individuals. Methods A nationwide telephone survey was conducted among visually-impaired individuals through local branches of the Japan Federation of the Blind. In total, 157 visually impaired individuals were eligible for this study. Demographic information and information about visual impairments, lifestyle, and sleep patterns were assessed using questionnaires and subsequent telephone interviews. CRSWD and insomnia were defined according to the International Classification of Sleep Disorders-Third Edition criteria. Results The prevalence of CRSWD in visually impaired individuals was 33.1%. Among those with CRSWD, a non-24-h/irregular sleep-wake rhythm type was the most frequently observed (26.8%), followed by an advanced sleep-wake phase type and a delayed sleep-wake phase type (3.8 and 2.5%, respectively). Furthermore, 28.7% of the visually impaired individuals were found to have insomnia. In the visually impaired individuals, the absence of light perception, unemployment, living alone, and use of hypnotics were significantly associated with CRSWD, whereas only the use of hypnotics was extracted as a marginally associated factor of insomnia. Conclusions CRSWD and insomnia were highly prevalent in visually impaired Japanese individuals. The presence of CRSWD among the visually impaired individuals was associated with a lack of light perception and/or social zeitgebers. |
| first_indexed | 2024-12-24T14:01:10Z |
| format | Article |
| id | doaj.art-c4107863380446ac9ed35cf75b1d6c76 |
| institution | Directory Open Access Journal |
| issn | 1471-2458 |
| language | English |
| last_indexed | 2024-12-24T14:01:10Z |
| publishDate | 2021-01-01 |
| publisher | BMC |
| record_format | Article |
| series | BMC Public Health |
| spelling | doaj.art-c4107863380446ac9ed35cf75b1d6c762022-12-21T16:52:28ZengBMCBMC Public Health1471-24582021-01-012111910.1186/s12889-020-09993-8Prevalence and associated factors of circadian rhythm sleep-wake disorders and insomnia among visually impaired Japanese individualsNorihisa Tamura0Taeko Sasai-Sakuma1Yuko Morita2Masako Okawa3Shigeru Inoue4Yuichi Inoue5Department of Psychology, Graduate School of Humanities and Social Sciences, Hiroshima UniversityDepartment of Somnology, Tokyo Medical UniversityDepartment of Liberal Arts, Faculty of Science and Technology, Tokyo University of ScienceDepartment of Somnology, Tokyo Medical UniversityDepartment of Preventive Medicine and Public Health, Tokyo Medical UniversityDepartment of Somnology, Tokyo Medical UniversityAbstract Background Although earlier studies have demonstrated that circadian rhythm sleep-wake disorders (CRSWD) are more prevalent in visually impaired individuals, the actual prevalence of CRSWD and insomnia among the visually impaired Japanese population remains unclear. The aim of this cross-sectional, telephone-based study was to estimate the prevalence of CRSWD and insomnia, and explore factors associated with CRSWD and insomnia among visually impaired Japanese individuals. Methods A nationwide telephone survey was conducted among visually-impaired individuals through local branches of the Japan Federation of the Blind. In total, 157 visually impaired individuals were eligible for this study. Demographic information and information about visual impairments, lifestyle, and sleep patterns were assessed using questionnaires and subsequent telephone interviews. CRSWD and insomnia were defined according to the International Classification of Sleep Disorders-Third Edition criteria. Results The prevalence of CRSWD in visually impaired individuals was 33.1%. Among those with CRSWD, a non-24-h/irregular sleep-wake rhythm type was the most frequently observed (26.8%), followed by an advanced sleep-wake phase type and a delayed sleep-wake phase type (3.8 and 2.5%, respectively). Furthermore, 28.7% of the visually impaired individuals were found to have insomnia. In the visually impaired individuals, the absence of light perception, unemployment, living alone, and use of hypnotics were significantly associated with CRSWD, whereas only the use of hypnotics was extracted as a marginally associated factor of insomnia. Conclusions CRSWD and insomnia were highly prevalent in visually impaired Japanese individuals. The presence of CRSWD among the visually impaired individuals was associated with a lack of light perception and/or social zeitgebers.https://doi.org/10.1186/s12889-020-09993-8Circadian rhythm sleep-wake disorderLight perceptionNon-24-h sleep-wake rhythm typePrevalenceVisual impairment |
| spellingShingle | Norihisa Tamura Taeko Sasai-Sakuma Yuko Morita Masako Okawa Shigeru Inoue Yuichi Inoue Prevalence and associated factors of circadian rhythm sleep-wake disorders and insomnia among visually impaired Japanese individuals BMC Public Health Circadian rhythm sleep-wake disorder Light perception Non-24-h sleep-wake rhythm type Prevalence Visual impairment |
| title | Prevalence and associated factors of circadian rhythm sleep-wake disorders and insomnia among visually impaired Japanese individuals |
| title_full | Prevalence and associated factors of circadian rhythm sleep-wake disorders and insomnia among visually impaired Japanese individuals |
| title_fullStr | Prevalence and associated factors of circadian rhythm sleep-wake disorders and insomnia among visually impaired Japanese individuals |
| title_full_unstemmed | Prevalence and associated factors of circadian rhythm sleep-wake disorders and insomnia among visually impaired Japanese individuals |
| title_short | Prevalence and associated factors of circadian rhythm sleep-wake disorders and insomnia among visually impaired Japanese individuals |
| title_sort | prevalence and associated factors of circadian rhythm sleep wake disorders and insomnia among visually impaired japanese individuals |
| topic | Circadian rhythm sleep-wake disorder Light perception Non-24-h sleep-wake rhythm type Prevalence Visual impairment |
| url | https://doi.org/10.1186/s12889-020-09993-8 |
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