Table 3.
Demographic, Clinical Characteristics of PNM Cases and Univariate Analysis
| Variable | All Patients (900) | Non-Survivors(112) | Survivors(788) | P |
|---|---|---|---|---|
| Basic condition | ||||
| Gender | 516(57.3%) | 70(62.5%) | 446(56.6%) | 0.262 |
| Age | 41(27,54) | 41(27,53) | 47(31,58) | 0.157 |
| Original disease | ||||
| Cranial tumors | 603(67.0%) | 73(65.2%) | 530(67.3%) | 0.668 |
| Spinal tumors | 18(2.0%) | 1(0.9%) | 17(2.2%) | 0.715 |
| Functional neurosurgery | 48(5.3%) | 2(1.8%) | 46(5.8%) | 0.111 |
| Neurovascular surgery | 58(6.4%) | 8(7.1%) | 50(6.3%) | 0.840 |
| Craniocerebral trauma surgery | 53(5.9%) | 7(6.3%) | 46(5.8%) | 0.830 |
| Others | 120(13.3%) | 21(18.8%) | 99(12.6%) | 0.076 |
| Risk factors | ||||
| Diabetes | 33(3.7%) | 5(4.4%) | 28(3.6%) | 0.592 |
| Hypertension | 141(15.7%) | 33(29.5%) | 108(13.7%) | <0.001 |
| TEM(°C) | 37.6±0.9 | 37.8±0.9 | 37.6±0.9 | 0.025 |
| Tumor | 621(69.0%) | 80(71.4%) | 541(68.7%) | 0.587 |
| Malignant tumor | 282(31.3%) | 48(42.9%) | 234(29.7%) | 0.007 |
| Length of operation(hours) | 4.5±3.0 | 5.0±3.0 | 4.5±3.0 | 0.062 |
| Reoperation | 199(22.1%) | 39(34.8%) | 160(20.3%)) | 0.001 |
| Craniotomy | 625(69.4%) | 79(70.5%) | 546(69.3%) | 0.872 |
| Surgical site | 0.715 | |||
| Head | 882(98.0%) | 111(99.1%) | 771(97.8%) | |
| Spine | 18(2.0%) | 1(0.9%) | 17(2.2%) | |
| Type of incision | 0.481 | |||
| Clean | 471(52.3%) | 55(49.1%) | 416(52.8%) | |
| Contamination | 429(47.7%) | 57(50.9%) | 372(47.2%) | |
| ICU admission | 357(39.7%) | 80(71.4%) | 277(35.2%) | <0.001 |
| CSF leakage | 138(15.3%) | 23(10.5%) | 115(14.6%) | 0.122 |
| EVD | 362(40.2%) | 69(61.6%) | 293(37.2%) | <0.001 |
| LD | 257(28.6%) | 48(42.9%) | 209(26.5%) | 0.001 |
| AMV | 359(39.9%) | 77(68.8%) | 282(35.8%) | <0.001 |
| Sepsis | 64.0(7.1%) | 12(10.7%) | 52(6.6%) | 0.120 |
| HAP | 124.0(13.8%) | 52(46.4%) | 72(9.1%) | <0.001 |
| Time procedure | ||||
| LOS(days) | 24(18, 36) | 31(21, 48) | 23(17.0, 34.3) | <0.001 |
| Time of PNM occurrence (days) | 8(4, 13) | 10.0(6.0, 16.0) | 7.0(4.0, 12.0) | <0.001 |
| Effective treatment days (days) | 5.1±7.3 | 6.8±10.5 | 4.9±6.8 | 0.794 |
| Fee(Yuan) | 71099.9 (50062.7, 118198.88) | 137254.0 (70352.5, 230416.0) | 68721.8 (48569.8, 106318.4) | <0.001 |