Association of postlunch napping duration and night-time sleep duration with cognitive impairment in Chinese elderly: a cross-sectional study
| Autor: | Yujia Zhai, Xinyi Wang, Fan He, Tao Zhang, Fudong Li, Xiao-Geng Chen, Xiao-Qing Pan, Junfen Lin, Min Yu |
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| Rok vydání: | 2018 |
| Předmět: |
Gerontology
Male China Time Factors Cross-sectional study Population Geriatric Medicine Cohort Studies 03 medical and health sciences 0302 clinical medicine Risk Factors combined effects Medicine Humans Cognitive Dysfunction 030212 general & internal medicine Prospective cohort study Cognitive impairment Association (psychology) education Aged cognitive impairment Aged 80 and over education.field_of_study Chinese elderly business.industry Research General Medicine Middle Aged Mental Status and Dementia Tests Circadian Rhythm Nap Lunch Duration (music) Population Surveillance Cohort sleep duration Female post-lunch napping business Sleep 030217 neurology & neurosurgery |
| Zdroj: | BMJ Open |
| ISSN: | 2044-6055 |
| Popis: | ObjectiveTo analyse the independent and combined associations of postlunch napping duration and night-time sleep duration with risk of cognitive impairment among Chinese elderly.DesignA cross-sectional study.SettingWe analysed the data from Zhejiang Ageing and Health Cohort, a population-based survey of seven counties located in Zhejiang province in eastern China.Participants10 740 participants aged 60 years or older were included in final analysis.Primary and secondary outcome measuresCognitive impairment was assessed through Mini-Mental State Examination. Data on sleep-related characteristics was collected in the behavioural habits section within the questionnaire.ResultsRelative to participants with 1–30 min of postlunch napping, those who did not nap and who napped longer had significantly higher risks for cognitive impairment. OR of cognitive impairment were 1.41 (95% CI 1.14 to 1.75) for participants with longer night-time sleep duration (≥9 hours), compared with those sleeping 7–8.9 hours. In addition, combined effects were further identified. Participants with both longer night-time sleep duration (≥9 hours) and longer postlunch napping duration (>60 min) (OR=2.01, 95% CI 1.30 to 3.13), as well as those with both longer night-time sleep duration (≥9 hours) and appropriate postlunch napping duration (1–30 min) (OR=2.01, 95% CI 1.20 to 3.38), showed significantly higher risk of cognitive impairment than those with sleeping 7–8 hours and napping 1–30 min. Meanwhile, a 34% increase in odds of cognitive impairment was observed in participants with both shorter night-time sleep duration (5–6.9 hours) and no napping.ConclusionBoth postlunch napping duration and night-time sleep duration were independently and jointly associated with cognitive impairment, which needs verification in prospective studies. |
| Databáze: | OpenAIRE |
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