Table 1.
Baseline characteristics for all patients and according to platelet count
| Variable | All patients (n = 4419) |
Platelet count (× 109/L) | |
|---|---|---|---|
| ≥ 100 (n = 3889) |
< 100 (n = 530) |
||
| Age, years | 58 [44–69] | 58 [44–69] | 50 [50–67] |
| Female gender | 1078 (24) | 971 (25) | 107 (20) |
| Functional dependency pre-admissiona | 464 (11) | 411 (11) | 53 (10) |
| Significant comorbidity | 418 (10) | 336 (9) | 82 (15) |
| Operative admission | 1370 (31) | 1180 (30) | 190 (36) |
| GCS score | |||
| 3–8 | 1942 (44) | 1610 (41) | 332 (63) |
| 9–12 | 873 (20) | 789 (20) | 84 (16) |
| 13–15 | 1604 (36) | 1490 (38) | 114 (22) |
| Platelet count, × 109/L | 181 [134–231] | 192 (152–239) | 80 (66–90) |
| Platelet transfusion during ICU stay | 299 (7%) | 118 (3%) | 181 (34%) |
| SAPS II score | 34 [23–49] | 33 [22–47] | 46 [32–60] |
| ICP monitoring | 1013 (23) | 879 (23) | 134 (25) |
| Mechanical ventilation | 2698 (61) | 2285 (59) | 413 (78) |
| ICU length-of-stay, days | 1.7 [0.8–3.8] | 1.7 [0.8–3.8] | 1.8 [0.9–3.9] |
| Hospital length-of-stay, days | 6 [3–10] | 6 [3–10] | 5 [2–9] |
| ICU mortality | 308 (7) | 216 (6) | 92 (17) |
| Hospital mortality | 501 (11) | 361 (9) | 140 (26) |
| 12-month mortality | 1109 (25) | 854 (22) | 255 (48) |
Continuous variables are presented as median [IQR] and categorical variables as n (%)
GCS Glasgow coma scale, ICP intracranial pressure, ICU intensive care unit, IQR interquartile range, N/A not applicable, SAPS simplified acute physiology score
aData missing for 137 patients