Table 1.
Cumulative odds ratios (95%CIs) of AMI onset associated with extremely low temperature by region and perioda.
| Region | Extremely low temperature (°C) | Referent temperature (°C) | AMI | STEMI | NSTEMI |
|---|---|---|---|---|---|
| National | -14.2 | 33.1 | 1.33 (1.24, 1.44) | 1.32 (1.20, 1.45) | 1.36 (1.20, 1.55) |
| HH | -19.4 | -9.6 | 1.02 (0.95, 1.10) | 1.02 (0.94, 1.10) | 1.04 (0.89, 1.22) |
| HNH | 0.6 | 32.8 | 1.24 (1.13, 1.37) | 1.24 (1.10, 1.39) | 1.25 (1.06, 1.48) |
| NW | -2.0 | 25.3 | 1.46 (1.20, 1.76) | 1.31 (1.02, 1.67) | 1.74 (1.29, 2.35) |
| NNW | 6.0 | 33.7 | 1.62 (1.46, 1.81) | 1.55 (1.35, 1.78) | 1.74 (1.48, 2.06) |
Note: a extremely low temperature refers to the 1st percentile of temperature, and the referent temperature is the minimum risk temperature.
Abbreviations: CIs, confidence intervals; AMI, acute myocardial infarction; STEMI, ST-segment-elevation myocardial infarction; NSTEMI, non-ST-segment-elevation myocardial infarction; HH, heating region during heating period; HNH, heating region during non-heating period; NW, non-heating region during winter; NNW, non-heating region during non-winter period.