Table 4.
Subgroup analysis for 28-day mortality according to baseline.
| Subgroup | Intervention group | Control group | P | ||
|---|---|---|---|---|---|
| No. of patients | 28-day mortality, no. (%) | No. of patients | 28-day mortality, no. (%) | ||
| Age, year | |||||
| ≤70 | 265 | 57 (21.5) | 272 | 56 (20.6) | 0.793 |
| >70 | 354 | 76 (21.5) | 347 | 112 (32.3) | 0.001 |
| ICU types | |||||
| CCU | 205 | 29 (14.1) | 165 | 43 (26.1) | 0.004 |
| Non-CCU | 414 | 104 (25.1) | 454 | 125 (27.5) | 0.421 |
| MV at baseline | |||||
| Yes | 486 | 107 (22.0) | 409 | 119 (29.1) | 0.015 |
| No | 316 | 40 (12.7) | 448 | 63 (14.1) | 0.576 |
| Heart disease | |||||
| Yes | 230 | 39 (17.0) | 252 | 74 (29.4) | 0.001 |
| No | 389 | 94 (24.2) | 367 | 94 (25.6) | 0.645 |
| Hypertension | |||||
| Yes | 352 | 63 (17.9) | 315 | 81 (25.7) | 0.014 |
| No | 267 | 70 (26.2) | 304 | 87 (28.6) | 0.521 |
| Atrial arrhythmia | |||||
| Yes | 86 | 16 (18.6) | 84 | 35 (41.7) | 0.001 |
| No | 533 | 117 (22.0) | 535 | 133 (24.9) | 0.262 |
| SOFA | |||||
| ≤8 | 254 | 42 (16.5) | 255 | 43（16.9） | 0.921 |
| >8 | 365 | 91 (24.9) | 364 | 125(34.3) | 0.005 |
Data are presented as proportions for categorical variables.
ICU, intensive care unit; CCU, cardiac care unit; MV, mechanical ventilation; SOFA, sequential organ failure assessment.