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To analyze the interaction between Body Mass Index (BMI) and sex on sleep quality of rural older adults in Chengdu, and to explore the differences in their sleep quality under different BMI and sex stratifications.
Based on the data of a cluster randomized controlled trial for rural older adults in Chengdu, 508 people aged 60 and above were involved. Questionnaires were administered using instruments such as the Pittsburgh Sleep Quality Index (PSQI) to collect information on sleep quality and demographics. Information of height and weight was obtained by physical measurements. Linear mixed models were used to analyze the interaction between BMI and sex on sleep quality, and stratified analyses were performed.
There was a significant interaction between BMI and sex on sleep quality (P<0.001). When stratified by sex, PSQI scores in the overweight and obese populations were significantly higher than the normal/underweight populationonly among the males. (difference=0.46, P=0.031; difference=1.53, P<0.001). When stratified by BMI, females had significantly higher PSQI scores than males in normal/underweight and overweight stratifications (difference=1.85, P<0.001; difference=2.17, P<0.001).
There is a significant interaction effect of BMI and sex on sleep quality among rural older adults. Comparing to males, females have poorer sleep quality in normal/underweight and overweight stratifications. Males have poorer sleep quality with higher BMI levels. Our study suggests that future sleep interventions and policy programs should be tailored according to different sex and BMI.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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