Table 3. Factors affecting tumor progression based on uni- and multivariate analyses.
| Factors | Univariate analyses | Multivariate analyses | |
|---|---|---|---|
| Age | 0.982 | ||
| Sex | 0.984 | ||
| Preoperative TV, cm3 | 0.415 | ||
| Location of residual tumors | |||
| IAC (reference) | |||
| CPA | 0.772 | ||
| IAC and CPA | 0.585 | ||
| Time to GKRS after surgery, mon | 0.711 | ||
| Residual TV, cm3 | 0.002 (HR, 1.173; 95% CI, 1.062–1.296) | 0.003 (HR, 1.229; 95% CI, 1.075–1.405) | |
| Prescription marginal dose, Gy | 0.190 | 0.520 | |
TV = tumor volume, IAC = internal auditory canal, CPA = cerebellopontine angle, GKRS = gamma knife radiosurgery, HR = hazard ratio, CI = confidence interval.