Table 2. Operative findings and characteristics.
| MF (n = 305) | RS (n = 72) | Statistical significance | |
|---|---|---|---|
| Removal | NS | ||
| Gross total | 97.0% | 93.1% | |
| Partial/elected | 3.0% | 6.9% | |
| Tumor origin | |||
| Superior vestibular | 36.1% | 26.4% | |
| Inferior vestibular | 44.6% | 33.3% | |
| Cochlear | 0.3% | 0.0% | |
| Unknown | 18.4% | 38.9% | p ≤ 0.005a |
| Other | 0.7% | 1.4% | |
| OR time (h, mean [SD]) | 4.0 (0.78) | 5.2 (1.02) | p ≤ 0.001 |
| Blood loss (mL, mean [SD]) | 291.9 (133) | 251.0 (74.8) | p ≤ 0.013 |
| Hospital stay (d, mean [SD]) | 4.3 (1.3) | 4.1 (0.9) | NS |
| Adherence to facial nerve | p ≤ 0.012 | ||
| None | 10.5% | 4.2% | |
| Minimal | 45.2% | 30.6% | |
| Moderate | 35.7% | 51.4% | |
| Severe | 8.5% | 13.9% | |
| Facial nerve intact | 99.7% | 100% | NS |
Abbreviations: MF, middle fossa; NS, not significant; RS, retrosigmoid; SD, standard deviation.
a
Unknown versus all others.