Table 2:
Univariable analysis of factors associated with single and multiple surgical procedures in subdural hematoma patients
| No surgery (N=2055) | Any surgery (N=1860) | p-value | Single surgery (N=1761) | Multiple surgeries (N=99) | p-value | |
|---|---|---|---|---|---|---|
| Age in years, median (IQR) | 76 (64, 84) | 71 (62, 80) | <0.0001 | 71 (63, 80) | 73 (61, 81) | 0.96 |
| Race, N (%) | ||||||
| White | 1410 (68.7) | 1214 (65.4) | 1139 (64.8) | 75 (75.8) | ||
| Black | 287 (14.0) | 253 (13.6) | 0.01 | 245 (13.9) | 8 (8.1) | 0.07 |
| Other | 356 (17.3) | 390 (21) | 374 (21.3) | 16 (16.2) | ||
| Unknown | 2 (0.1) | 3 (0.2) | 3 (0.2) | 0 | ||
| Sex, N (%) | ||||||
| Female | 882 (42.9) | 551 (29.6) | <0.0001 | 519 (29.5) | 32 (32.3) | 0.54 |
| Male | 1173 (57.1) | 1309 (70.4) | 1242 (70.3) | 67 (67.7) | ||
| Care setting, N (%) | ||||||
| Nonacademic | 905 (44) | 780 (41.9) | 0.18 | 739 (42) | 41 (41.4) | 0.92 |
| Academic | 1150 (56) | 1080 (58.1) | 1022 (58) | 58 (58.6) | ||
| Region of United States, N (%) | ||||||
| Midwest | 405 (19.7) | 324 (17.4) | 308 (17.5) | 16 (16.2) | ||
| Northeast | 362 (17.6) | 297 (16) | 0.0007 | 284 (16.1) | 13 (13.1) | 0.81 |
| South | 1073 (52.2) | 970 (52.2) | 916 (52) | 54 (54.6) | ||
| West | 215 (10.5) | 269 (14.5) | 253 (14.4) | 16 (16.2) | ||
| Initial Surgery, N (%) | ||||||
| Burr Hole | N/A | 1614 (86.8) | N/A | 1522 (81.8) | 92 (5) | 0.067 |
| Craniotomy/craniectomy | N/A | 246 (13.2) | 239 (12.8) | 7 (0.4) |