Table 1.
Baseline characteristics
| Baseline characteristics | ||
|---|---|---|
| OVERALL (n = 595) | ||
| Male, n (%) | 274 | (46.1) |
| Mean age, years (SD) | 52.8 | (14.4) |
| > 65y, n (%) | 148 | (24.9) |
| Urgent surgery, n (%) | 79 | (13.3) |
| Reason of surgery: | ||
| Intrinsic tumour, n (%) | 234 | (39.3) |
| Extrinsic tumour, n (%) | 123 | (20.7) |
| Epilepsy, n (%) | 23 | (3.9) |
| Vascular, n (%) | 152 | (25.5) |
| Trauma, n (%) | 17 | (2.9) |
| Others, n (%) | 46 | (7.7) |
| Surgical site: | ||
| Supratentorial, n (%) | 449 | (75.5) |
| Infratentorial, n (%) | 62 | (10.4) |
| Retromastoid, n (%) | 84 | (14.1) |
| Duration of surgery, minutes (SD) | 256.9 | (101.5) |
| > P75a, n (%) | 152 | (25.5) |
| Mean hospital stay, median (range) | 7 | (5–14) |
| CHARLSON score, (range) | 3 | (0–13) |
| < 3, n (%) | 292 | (49.1) |
| 3–5, n (%) | 214 | (36) |
| 6–8, n (%) | 69 | (11.6) |
| > 9, n (%) | 20 | (3.4) |
| ASAb, (range) | 2 | (1–5) |
| ASA > 2, n (%) | 223 | (37.5) |
| NNISc, (range) | 1 | (0–2) |
| NNIS I-II, n (%) | 441 | (74.1) |
a > 75 percentile of duration of surgery
bAmerican Society of Anaesthesiologists
cNational Nosocomial Infection Surveillance System