Table 1 Baseline clinical characteristics of patients
|  | All patients (n = 6251) | Stratification by first day P/F ratio | |||
|---|---|---|---|---|---|
 > 300 mm Hg (n = 2448) |  > 200 to ≤ 300 mm Hg (n = 958) |  > 100 to ≤ 200 mm Hg (n = 1736) |  ≤ 100 mm Hg (n = 1109) | ||
Age (years) | 65 (53, 75) | 65 (54, 76) | 66 (55, 77) | 65 (53, 75) | 62 (52, 73) |
Male | 3612 (57.8%) | 1341 (54.8%) | 547 (57.1%) | 1049 (60.4%) | 675 (60.9%) |
Weight (kg) | 80.6 (67.7, 98.1) | 76 (64.6, 91.5) | 81.1 (67.9, 98) | 85.7 (70.2, 103.3) | 86 (70.3, 102) |
Height (cm) | 170 (165, 175) | 170 (163, 173) | 170 (163, 175) | 170 (165, 175) | 170 (165, 175) |
SOFA score | 7 (4, 10) | 4 (2, 6) | 5 (3, 8) | 9 (6, 11) | 10 (8, 13) |
SAPS-II score | 44 (34, 55) | 37 (29, 47) | 44 (35, 55) | 48 (39, 59) | 52 (42, 63) |
Co-morbidities | |||||
 Congestive heart failure | 2021 (32.3%) | 727 (29.7%) | 324 (33.8%) | 567 (32.7%) | 403 (36.3%) |
 Cerebrovascular disease | 1260 (20.2%) | 657 (26.8%) | 199 (20.8%) | 262 (15.1%) | 142 (12.8%) |
 Chronic pulmonary disease | 1796 (28.7%) | 643 (26.3%) | 275 (28.7%) | 534 (30.8%) | 344 (31%) |
 Diabetes without complication | 1595 (25.5%) | 592 (24.2%) | 226 (23.6%) | 472 (27.2%) | 305 (27.5%) |
 Diabetes with complication | 614 (9.8%) | 247 (10.1%) | 97 (10.1%) | 156 (9%) | 114 (10.3%) |
 Malignant cancer | 749 (12%) | 316 (12.9%) | 100 (10.4%) | 195 (11.2%) | 138 (12.4%) |
 Renal disease | 1442 (23.1%) | 556 (22.7%) | 226 (23.6%) | 387 (22.3%) | 273 (24.6%) |
 Severe liver disease | 580 (9.3%) | 214 (8.7%) | 83 (8.7%) | 173 (10%) | 110 (9.9%) |