Table 2 Characteristics of brain operations
Operation | Unit | Total population N=2231 | NI group N=151 | Control group N=2080 | p value |
|---|---|---|---|---|---|
Operation | pts | 2231(64.4%) | 151(76.3%) | 2080 (63.7%) | <0.001 |
More than 1 operation | pts | 214(9.6%) | 42(27.8%) | 172(8.3%) | <0.001 |
ASA score |  |  | 3.8±1.0 | 3.1±1.1 | <0.001 |
Day of hospitalisation | day |  | 5.5±9.8 | 7.1±17.1 | 0.430 |
Day of NICU |  |  | 1.6±1.3 | 1.3±1.1 | 0.535 |
Acute operation | pts | 905(40.6%) | 106(70.2%) | 799(38.4%) | <0.001 |
Reoperation | pts | 479(21.5%) | 58(38.4%) | 421(20.2%) | <0.001 |
Time of operation | minutes |  | 151.9±108.4 | 137.7±89.4 | 0.080 |
Craniotomy | pts | 1361(61.0%) | 82(54.3%) | 1279(61.5%) | 0.080 |
Craniectomy | pts | 363(16.3%) | 50(33.1%) | 313(15.0%) | <0.001 |
Trepanation | pts | 227(10.2%) | 23(15.2%) | 204(9.8%) | 0.033 |
Hypophysis | pts | 85(3.8%) | 0(0.0%) | 85(4.1%) | 0.011 |
Shunt | pts | 108(4.8%) | 12(7.9%) | 96(4.6%) | 0.066 |
Others | pts | 99(4.4%) | 9(6.0%) | 90(4.3%) | 0.347 |
Drainage | pts | 1678(75.2%) | 131(86.8%) | 1547(74.4%) | <0.001 |
 Redon | pts | 858(38.5%) | 49(32.5%) | 809(38.9%) | 0.001 |
 Time overall | day |  | 2.0±0.9 | 1.8±1.3 | 0.395 |
 Gravity drainage | pts | 807(36.2%) | 75(49.7%) | 732(35.2%) | 0.029 |
  Time overall | day |  | 3.5±2.1 | 2.7±2.2 | 0.004 |
 Lumbar | pts | 218(9.8%) | 36(23.8%) | 182(8.8%) | <0.001 |
  Day overall | day |  | 7.7±5.5 | 5.1±3.2 | <0.001 |
 Ventricular | pts | 138(6.2%) | 21(13.9%) | 117(5.6%) | <0.001 |
  Day overall | day |  | 13.4±9.9 | 5.9±4.3 | <0.001 |