Table 2. Univariate analysis of the association between each factor and postoperative hydrocephalus.
| Variables | Postoperative CSF diversion | P-value | |
|---|---|---|---|
| Yes (15) | No (106) | ||
| Sex | 0.012a | ||
| Female | 3 (4.9%) | 51 (95.1%) | |
| Male | 12 (20%) | 48 (80%) | |
| Tumor size (mm) | 40 (34–49) | 36 (30–43) | 0.100 |
| Age (years) | 18 (3–38) | 24 (9–41) | 0.301 |
| Tumor pathology | |||
| Ependymoma | 3 (8.1%) | 34 (91.9%) | 0.226b c |
| Medulloblastoma | 5 (17.2%) | 24 (82.8%) | 1.0b c |
| Astrocytoma | 4 (20.0%) | 16 (80.0%) | |
| Lateral extension | 0.553b | ||
| Yes | 3 (8.8%) | 31 (91.2%) | |
| No | 12 (13.8%) | 75 (86.2%) | |
| Anterior extension | 0.159b | ||
| Yes | 88 (89.8%) | 10 (10.2%) | |
| No | 5 (21.7%) | 18 (78.3%) | |
| Caudal extension | 0.420a | ||
| Yes | 10 (14.5%) | 59 (85.5%) | |
| No | 5 (9.6%) | 47 (90.4%) | |
| Superior extension | 0.015b | ||
| Yes | 5 (35.7%) | 9 (64.3%) | |
| No | 10 (9.3%) | 97 (90.7%) | |
| Extent of resection | <0.001b | ||
| GTR | 3 (3.3%) | 87(96.7%) | |
| STR | 12 (38.7%) | 19(61.3%) | |
| Preoperative hydrocephalus | <0.001a | ||
| Yes | 15 (21.4%) | 55 (78.6%) | |
| No | 0 (0%) | 51 (100%) | |
| Prophylactic EVD | 0.091a | ||
| Yes | 10 (17.9%) | 46 (82.1%) | |
| No | 5 (7.7%) | 60 (92.3%) | |
CSF, cerebrospinal fluid; GTR, gross total resection; STR, subtotal resection; EVD, external ventricular drainage.
a Chi-square test.
b Fisher exact test.
c p value compared with astrocytoma.