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To explore the relationship between body mass index (BMI), household fuel type, and peak expiratory flow(PEF) in middle-aged and elderly Chinese people aged 45 and above.
Based on the data of China Health and Retirement Longitudinal Study in 2013 and 2015, the BMI and PEF of the participants were measured and evaluated. According to the self-reported household fuel types, cooking and heating fuels were divided into solid fuel and clean fuel. Linear mixed model was used to analyze the relationships of BMI and household solid fuels using with PEF changes, and residential location was included as a random term. Subgroup analysis and interaction analysis were conducted by gender, urban-rural setting, smoking status, and fuels types.
There was a significant correlation between the reduction of BMI and PEF (β=-1.33,95%CI: -2.31 to -0.33). Compared with the group using clean fuel, the PEF of the group using solid fuel decreased faster than that of the group using clean fuel (cooking: β=-10.16, 95%CI: -16.78 to -3.55; heating: β=-10.13, 95%CI: -18.70 to -1.46). Solid fuels use for heating increased the magnitude of BMI-related PEF decline (interaction P=0.030).
High BMI and solid fuel use are the risk factors for the reduction of PEF in the middle-aged and elderly in China, and there is an interaction between BMI and solid fuel for heating on the reduction of PEF.
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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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