Characteristics | Derivation set (n = 1891) | Validation set (n = 1855) | ||||
---|---|---|---|---|---|---|
Survivorsa (n = 1463) | Non-survivorsb (n = 428) | p value | Survivorsc (n = 1410) | Non-survivorsd (n = 445) | p value | |
Age (year): mean (SD) | 59.3 (16.92) | 67.7 (14.58) | <0.001e | 59.6 (16.07) | 68.3 (14.40) | <0.001e |
Gender: n (%) | ||||||
Male | 830 (56.93) | 231 (54.10) | 0.301f | 786 (56.22) | 266 (59.91) | 0.172f |
Female | 628 (43.07) | 196 (45.90) | 612 (43.78) | 178 (40.09) | ||
BMI (kg/m2): mean (SD) | 28.5 (7.69) | 27.1 (6.93) | <0.001e | 28.9 (8.39) | 27.1 (6.78) | <0.001e |
Use of thromboprophylaxis: n (%) | ||||||
Unfractionated heparin | 718 (49.08) | 234 (54.67) | 0.042f | 696 (49.36) | 225 (50.56) | 0.659f |
Dalteparin | 745 (50.92) | 194 (45.33) | 714 (50.64) | 220 (49.44) | ||
APACHE II score: mean (SD) | 20.8 (7.61) | 24.1 (7.59) | <0.001e | 20.6 (7.59) | 24.5 (7.84) | <0.001e |
History of malignancy: n (%) | 50 (3.43) | 21 (4.92) | 0.155f | 47 (3.36) | 32 (7.21) | <0.001f |
Medical admission: n (%) | 1086 (74.23) | 353 (82.48) | <0.001f | 1046 (74.18) | 346 (77.75) | 0.129f |
Diagnosis of sepsis on admission: n (%) | 208 (14.27) | 90 (21.08) | <0.001f | 177 (12.66) | 74 (16.67) | 0.032f |
Intervention within the first 24 h on admission: n (%) | ||||||
Inotropes or vasopressors | 614 (42.20) | 241 (56.44) | <0.001f | 579 (41.42) | 243 (54.73) | <0.001f |
Invasive mechanical ventilation | 1207 (82.96) | 373 (87.35) | 0.030f | 1149 (82.19) | 380 (85.59) | 0.097f |
Dialysis | 57 (3.92) | 45 (10.54) | <0.001f | 87 (6.22) | 39 (8.78) | 0.063f |
Acetylsalicylic acid or clopidogrel | 290 (19.93) | 113 (26.46) | 0.004f | 289 (20.49) | 112 (25.23) | 0.029f |
Statin | 169 (11.62) | 62 (14.52) | 0.108f | 199 (14.23) | 59 (13.29) | 0.617f |