Key points are not available for this paper at this time.
The short-term association of ambient temperature exposure with lung function in middle-aged and elderly Chinese remains obscure. The study included 19,128 participants from the Dongfeng-Tongji cohort's first (2013) and second (2018) follow-ups. The lung function for each subject was determined between April and December 2013 and re-assessed in 2018, with three parameters (forced vital capacity FVC, forced expiratory volume in one second FEV1, and peak expiratory flow PEF) selected. The China Meteorological Data Sharing Service Center provided temperature data during the study period. In the two follow-ups, a total of 25,511 records (average age: first, 64.57; second, 65.80) were evaluated, including 10,604 males (41.35%). The inversely J-shaped associations between moving average temperatures (lag01, lag02, lag04, and lag07) and FVC, FEV1, and PEF were observed, and the optimum temperatures in lag04 were 16.5 °C, 18.7 °C, and 16.2 °C, respectively. In lag04, every 1°C increase in temperature was associated with 14.07 mL, 9.78 mL, and 62.72 mL/s increase in FVC, FEV1, and PEF in the low-temperature zone (< the optimum temperatures), whereas 5.72 mL, 2.01 mL, and 11.64 mL/s decrease in the high-temperature zone (≥ the optimum temperatures), respectively (all P < 0.05). We observed significant effect modifications of gender, age, body mass index, body surface area, smoking status, drinking status, and physical activity on the associations (all P modification < 0.05). Non-optimal temperatures may cause lung function decline. Several individual characters and lifestyles have effect modification on the temperature effects.
Qiu et al. (Sat,) studied this question.