TABLE 1.
Summary of the association between B7-H1 expression (absent [0] and marked [2+]) and patient/tumor characteristics
| Absent B7-H1 expression (n = 9) |
Marked B7-H1 expression (n = 16) |
p value |
|
|---|---|---|---|
| Mean patient age (yr) | 55.7 | 48.8 | 0.36 (KW) |
| Cystic | 0.24 (F) | ||
| Yes | 2 (22.2%) | 1 (6.3%) | |
| No | 7 (77.8%) | 15 (93.8%) | |
| Failed stereotactic radiation | 0.029 (F) | ||
| Yes | 0 | 5 (31.3%) | |
| No | 9 (100%) | 11 (68.8%) | |
| Neurofibromatosis type II status | 1.00 (F) | ||
| Yes | 1 (11.1%) | 2 (12.5%) | |
| No | 8 (88.9%) | 14 (87.5%) | |
| Dysequilibrium | 0.30 (F) | ||
| Yes | 7 (77.8%) | 7 (43.8%) | |
| No | 2 (22.2%) | 9 (56.3%) | |
| Tinnitus | 0.23 (F) | ||
| Yes | 4 (44.4%) | 11 (68.8%) | |
| No | 5 (55.6%) | 5 (31.3%) | |
| Preoperative facial nerve function (House-Brackmann Scale) | 0.63 (KW) | ||
| 1 | 8 (88.9%) | 14 (87.4%) | |
| 2 | 1 (11.1%) | 0 | |
| 3 | 0 | 1 (6.3%) | |
| 4 | 0 | 1 (6.3%) | |
| 5 | 0 | 0 | |
| 6 | 0 | 0 | |
| Mean preoperative word recognition (%) | 70.6 | 49.6 | 0.16 (F) |
| Preoperative hearing class | 0.12 (KW) | ||
| Unknown | 1 (0.11%) | 0 | |
| A | 3 (37.5%) | 5 (31.2%) | |
| B | 3 (37.5%) | 3 (18.8%) | |
| C | 0 | 0 | |
| D | 2 (25%) | 8 (50%) | |
| Average preoperative magnetic resonance imaging size—maximal cerebellopontine angle diameter (cm) or maximal Internal auditory canal length (cm) | 1.8 | 1.6 | 0.36 (F) |
The comparisons of nominal variables were evaluated using the Fisher’s exact test (F). The comparisons of ordinal or continuously scaled variables were evaluated using the nonparametric Kruskal-Wallis (KW) test.
Bold values are those that reach statistical significance (p < 0.05).