Table 1.
Demographics and clinical characteristics between intracranial pressure monitored and unmonitored cohorts before and after propensity score matching
| Before matching (n=3289) |
After matching (n=1154) |
|||||
|---|---|---|---|---|---|---|
| No ICP monitoring (n=2688) | ICP monitoring (n=601) | P | No ICP monitoring (n=577) | ICP monitoring (n=577) | P | |
| Level-1 Trauma center, n (%) | 1304 (48.5) | 352 (58.6) | <0.001 | 309 (53.6) | 337 (58.4) | 0.110 |
| Male gender, n (%) | 1917 (71.3) | 477 (79.4) | <0.001 | 470 (81.5) | 456 (79.0) | 0.175 |
| Age years, mean (SD) | 53.1 (20.3) | 43.6 (17.7) | <0.001 | 44 (18.5) | 44.3 (16.5) | 0.668 |
| Age ≥55 years, n (%) | 1315 (48.9) | 171 (28.5) | <0.001 | 181 (31.4) | 171 (29.6) | 0.395 |
| GCS, median (LQ, UQ) | 4 (3,7) | 4 (3,6) | 0.250 | 4 (3,7) | 4 (3,6) | 0.320 |
| GCS 3, n (%) | 1329 (49.4) | 300 (49.9) | 0.857 | 285 (49.4) | 288 (49.9) | 0.905 |
| GCS 4, n (%) | 118 (4.4) | 32 (5.3) | 0.330 | 29 (5.0) | 32 (5.5) | 0.798 |
| GCS 5, n (%) | 146 (5.4) | 38 (6.3) | 0.378 | 28 (4.9) | 37 (6.4) | 0.314 |
| GCS 6, n (%) | 360 (13.4) | 90 (15.0) | 0.325 | 74 (12.8) | 86 (14.9) | 0.356 |
| GCS 7, n (%) | 420 (15.6) | 82 (13.6) | 0.234 | 91 (15.8) | 76 (13.2) | 0.245 |
| GCS 8, n (%) | 315 (11.7) | 59 (9.8) | 0.201 | 70 (12.1) | 58 (10.1) | 0.290 |
| AIS head 3, n (%) | 371 (13.8) | 25 (4.2) | <0.001 | 23 (4.0) | 25 (4.3) | 0.754 |
| AIS head 4, n (%) | 1636 (60.9) | 320 (53.2) | 0.001 | 333 (57.7) | 319 (55.3) | 0.275 |
| AIS head 5, n (%) | 681 (25.3) | 256 (42.6) | <0.001 | 221 (38.3) | 233 (40.4) | 0.346 |
| SAH, n (%) | 1066 (39.7) | 290 (48.3) | <0.001 | 290 (50.3) | 276 (47.8) | 0.333 |
| SDH, n (%) | 832 (31.0) | 216 (35.9) | 0.020 | 194 (33.6) | 202 (35.0) | 0.594 |
| EDH, n (%) | 88 (3.3) | 48 (8.0) | <0.001 | 35 (6.1) | 40 (6.9) | 0.620 |
| Contusion, n (%) | 262 (9.7) | 94 (15.6) | <0.001 | 79 (13.7) | 86 (14.9) | 0.582 |
| Multiple intracranial injuries | 630 (23.4) | 222 (36.9) | <0.001 | 196 (34.0) | 207 (35.9) | 0.491 |
| Craniectomy/craniotomy, n (%) | 451 (16.8) | 216 (35.9) | <0.001 | 190 (32.9) | 193 (33.4) | 0.865 |
ICP: Intracranial pressure, GCS: Glasgow coma scale score, AIS: Abbreviated injury scale, SAH: Subarachnoid hemorrhage, SDH: Subdural hemorrhage, EDH: Epidural hemorrhage, SD: Standard deviation, LQ: Lower quartile, UQ: Upper quartile