Table 2. Distribution of ACS patients for 488-day study period *39 study hospitals, stratified by air pressure (AP) and temperature (T).
| high T (>26 °C) | mild T (21–26 °C) | low T (<21 °C) | p value! | ||||
|---|---|---|---|---|---|---|---|
| low AP (<1009 hpa) | high AP (≥1009 hpa) | low AP | high AP | low AP | high AP | ||
| Number of hospital days | 6288 | 748 | 2274 | 3021 | 164 | 6537 | ‒ |
| Total case no. | 1306 | 54 | 380 | 489 | 16 | 919 | |
| Case per hospital day | 0.21 | 0.07 | 0.17 | 0.16 | 0.1 | 0.14 | <0.001 |
| Gender (male %) | 1018/1306 (78.0%) | 42/54 (77.8%) | 300/380 (79.0%) | 364/489 (74.4%) | 15/16 (93.8%) | 727/919 (79.1%) | 0.238 |
| Age | 62.55 ± 13.44 | 64.31 ± 14.19 | 63.43 ± 14.1 | 63.22 ± 13.67 | 65.19 ± 15.63 | 63.29 ± 13.36 | 0.652 |
| BMI | 25.45 ± 3.84 | 24.7 ± 3.49 | 25.3 ± 4.08 | 25.4 ± 3.92 | 26.09 ± 6.09 | 25.44 ± 3.92 | 0.776 |
| Diabetes no. | 459 (35.4%) | 16 (29.6%) | 117 (30.8%) | 195 (40.1%) | 7 (43.75%) | 334 (36.7%) | 0.08 |
| Dyslipidemia no. | 512 (39.7%) | 17 (31.5%) | 155 (40.8%) | 190 (39.1%) | 7 (43.75%) | 344 (37.8%) | 0.739 |
| Hypertension no. | 796 (61.7%) | 36 (67.9%) | 254 (66.8%) | 312 (64.3%) | 12 (75%) | 591 (65.1%) | 0.3 |
*: ±one standard deviation.
!: Across-strata comparison: one-way ANOVA for age and BMI, and chi-square test for gender and comorbidity proportions.