Relative Risk of Myocardial Infarction per 1°C Change in Diurnal Temperature Range (DTR) above the Threshold Temperature in All Regions by Season.

Model adjusted for precipitation, humidity, sea level pressure, and air pollutants (PM10, NO2) using a spline function.RR = Relative risk.STEMI: ST elevation myocardial infarction.Non-STEMI: Non-ST elevation myocardial infarction.Spring: March–May, Summer: June–August, Autumn: September–November, Winter: December–February.*P** PaThreshold temperature.bNo threshold effect was identified.

本模型采用样条函数（spline function）对降水、相对湿度、海平面气压及空气污染物（PM10、NO2）进行校正。RR为相对风险（Relative risk）。STEMI即ST段抬高型心肌梗死（ST elevation myocardial infarction），Non-STEMI即非ST段抬高型心肌梗死（Non-ST elevation myocardial infarction）。春季为3月至5月，夏季为6月至8月，秋季为9月至11月，冬季为12月至次年2月。*P** 代表阈值温度（threshold temperature），b 未检测到阈值效应。