The combined effects of sleep and extreme heat exposure on cognitive function among older adults
Background: Extreme heat is linked to cognitive impairment. Normal sleep duration and good sleep quality can reduce cognitive impairment risks. However, the combined impact of sleep (duration and quality) and extreme heat on cognitive impairment is unclear. This study tests whether normal sleep dura...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-01-01
|
| Series: | Ecotoxicology and Environmental Safety |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0147651325000193 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832590940014903296 |
|---|---|
| author | Wensu Zhou Xuezhu Li Qiong Wang Li Ling Hui Zhang |
| author_facet | Wensu Zhou Xuezhu Li Qiong Wang Li Ling Hui Zhang |
| author_sort | Wensu Zhou |
| collection | DOAJ |
| description | Background: Extreme heat is linked to cognitive impairment. Normal sleep duration and good sleep quality can reduce cognitive impairment risks. However, the combined impact of sleep (duration and quality) and extreme heat on cognitive impairment is unclear. This study tests whether normal sleep duration and good sleep quality during a heatwave reduce cognitive impairment compared to poor sleep quality and long sleep duration in older adults. Methods: This study used cohort data from 9153 older adults. Extreme heat was defined as periods ≥ 3 days with daily minimum temperatures above the 92.5th percentile during the warm season. Cognitive function was assessed with the Mini-Mental State Examination (MMSE). Sleep duration was categorized as long, normal, or short, and sleep quality as good or poor. Six and four categories were used for combinations of heatwave exposure with sleep duration and quality, respectively. Cox regression models were applied for analysis. Results: Compared to those with long sleep duration during heatwaves, participants exposed to heatwaves with normal sleep duration had lower cognitive impairment risk (HR: 0.86, 95 %CI: 0.76–0.97). Those exposed to extreme heat with short sleep duration also showed lower cognitive risks (HR: 0.74, 95 %CI: 0.62–0.88). Compared to those with poor sleep quality during heatwave, participants with good sleep quality during heatwaves did not show significantly lower cognitive impairment risk (HR: 1.10, 95 %CI: 0.98–1.23). Conclusion: Older adults with normal or short sleep duration during heatwaves may face lower cognitive impairment risks, highlighting the importance of sleep guidance to protect cognitive health during extreme heat. |
| format | Article |
| id | doaj-art-2a16345b05d14358ac5ed46ae3cccd1a |
| institution | Kabale University |
| issn | 0147-6513 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ecotoxicology and Environmental Safety |
| spelling | doaj-art-2a16345b05d14358ac5ed46ae3cccd1a2025-01-23T05:26:05ZengElsevierEcotoxicology and Environmental Safety0147-65132025-01-01289117683The combined effects of sleep and extreme heat exposure on cognitive function among older adultsWensu Zhou0Xuezhu Li1Qiong Wang2Li Ling3Hui Zhang4School of Public Health, Sun Yat-sen University, Guangzhou, ChinaSchool of Public Health, Sun Yat-sen University, Guangzhou, ChinaSchool of Public Health, Sun Yat-sen University, Guangzhou, ChinaSchool of Public Health, Sun Yat-sen University, Guangzhou, ChinaCorrespondence to: School of Public Health, Sun Yat-sen University, No.74, Zhongshan 2nd Road, Guangzhou 510080, China.; School of Public Health, Sun Yat-sen University, Guangzhou, ChinaBackground: Extreme heat is linked to cognitive impairment. Normal sleep duration and good sleep quality can reduce cognitive impairment risks. However, the combined impact of sleep (duration and quality) and extreme heat on cognitive impairment is unclear. This study tests whether normal sleep duration and good sleep quality during a heatwave reduce cognitive impairment compared to poor sleep quality and long sleep duration in older adults. Methods: This study used cohort data from 9153 older adults. Extreme heat was defined as periods ≥ 3 days with daily minimum temperatures above the 92.5th percentile during the warm season. Cognitive function was assessed with the Mini-Mental State Examination (MMSE). Sleep duration was categorized as long, normal, or short, and sleep quality as good or poor. Six and four categories were used for combinations of heatwave exposure with sleep duration and quality, respectively. Cox regression models were applied for analysis. Results: Compared to those with long sleep duration during heatwaves, participants exposed to heatwaves with normal sleep duration had lower cognitive impairment risk (HR: 0.86, 95 %CI: 0.76–0.97). Those exposed to extreme heat with short sleep duration also showed lower cognitive risks (HR: 0.74, 95 %CI: 0.62–0.88). Compared to those with poor sleep quality during heatwave, participants with good sleep quality during heatwaves did not show significantly lower cognitive impairment risk (HR: 1.10, 95 %CI: 0.98–1.23). Conclusion: Older adults with normal or short sleep duration during heatwaves may face lower cognitive impairment risks, highlighting the importance of sleep guidance to protect cognitive health during extreme heat.http://www.sciencedirect.com/science/article/pii/S0147651325000193Climate changeHeatwaveCognition functionSleep qualitySleep duration |
| spellingShingle | Wensu Zhou Xuezhu Li Qiong Wang Li Ling Hui Zhang The combined effects of sleep and extreme heat exposure on cognitive function among older adults Ecotoxicology and Environmental Safety Climate change Heatwave Cognition function Sleep quality Sleep duration |
| title | The combined effects of sleep and extreme heat exposure on cognitive function among older adults |
| title_full | The combined effects of sleep and extreme heat exposure on cognitive function among older adults |
| title_fullStr | The combined effects of sleep and extreme heat exposure on cognitive function among older adults |
| title_full_unstemmed | The combined effects of sleep and extreme heat exposure on cognitive function among older adults |
| title_short | The combined effects of sleep and extreme heat exposure on cognitive function among older adults |
| title_sort | combined effects of sleep and extreme heat exposure on cognitive function among older adults |
| topic | Climate change Heatwave Cognition function Sleep quality Sleep duration |
| url | http://www.sciencedirect.com/science/article/pii/S0147651325000193 |
| work_keys_str_mv | AT wensuzhou thecombinedeffectsofsleepandextremeheatexposureoncognitivefunctionamongolderadults AT xuezhuli thecombinedeffectsofsleepandextremeheatexposureoncognitivefunctionamongolderadults AT qiongwang thecombinedeffectsofsleepandextremeheatexposureoncognitivefunctionamongolderadults AT liling thecombinedeffectsofsleepandextremeheatexposureoncognitivefunctionamongolderadults AT huizhang thecombinedeffectsofsleepandextremeheatexposureoncognitivefunctionamongolderadults AT wensuzhou combinedeffectsofsleepandextremeheatexposureoncognitivefunctionamongolderadults AT xuezhuli combinedeffectsofsleepandextremeheatexposureoncognitivefunctionamongolderadults AT qiongwang combinedeffectsofsleepandextremeheatexposureoncognitivefunctionamongolderadults AT liling combinedeffectsofsleepandextremeheatexposureoncognitivefunctionamongolderadults AT huizhang combinedeffectsofsleepandextremeheatexposureoncognitivefunctionamongolderadults |