Relative Risk of Myocardial Infarction per 1°C Change in Temperature above Threshold temperature by Subgroup.

<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>For heat exposure, temperature increase of 1°C above threshold.</p>b<p>For cold exposure, temperature decrease of 1°C below threshold.</p>c<p>Maximum temperature.</p>d<p>Mean temperature.</p>e<p>Minimum temperature.</p>f<p>Threshold temperature.</p>g<p>No threshold effect was identified.