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

<p>Model adjusted for precipitation, humidity, sea level pressure, and air pollutants (PM10, NO₂) using a spline function.</p><p>RR = Relative risk.</p><p>STEMI: ST elevation myocardial infarction.</p><p>Non-STEMI: Non-ST elevation myocardial infarction.</p><p>Spring: March–May, Summer: June–August, Autumn: September–November, Winter: December–February.</p><p>*<b><i>P</i></b><0.05;</p><p>** <b><i>P</i></b><0.001.</p>a<p>Threshold temperature.</p>b<p>No threshold effect was identified.