Figure 3.

Lag structures for the associations of AMI onset with extremely low temperature by region and period. (A) heating region during heating period; (B) heating region during non-heating period; (C) non-heating region during winter; (D) non-heating region during non-winter period. The solid black lines are the odds ratios (extremely low temperature: 1^st percentile of temperature vs. the minimum risk temperature) of AMI onset, and the gray areas are the 95% confidence intervals. Abbreviations: AMI, acute myocardial infarction.