Table 2.
Multivariable and Univariable Analysis of Risk Factors for Final Recovery
| Follow up ≥ 6 months | Follow up ≥ 1 year | ||||||
|---|---|---|---|---|---|---|---|
| Dependent: Final Recovery | all | HR (univariable) | HR (multivariable reduced)b | all | HR (univariable) | HR (multivariable reduced)a | |
| Age (years) | > 50 | 226 (64.8) | - | - | 206 (64.6) | - | - |
| ≤ 50 | 123 (35.2) | 0.86 (0.65–1.14, p = 0.308) | 0.79 (0.59–1.06, p = 0.116) | 113 (35.4) | 0.87 (0.66–1.17, p = 0.363) | 0.80 (0.59–1.08, p = 0.151) | |
| Sex | Female | 209 (59.9) | - | - | 190 (59.6) | - | - |
| Male | 140 (40.1) | 1.61 (1.23–2.11, p < 0.001) | 1.61 (1.22–2.13, p = 0.001) | 129 (40.4) | 1.65 (1.25–2.17, p < 0.001) | 1.63 (1.22–2.17, p = 0.001) | |
| Symptom Duration (years) | ≥ 6 | 204 (58.5) | - | - | 184 (57.7) | - | - |
| < 6 | 145 (41.5) | 1.26 (0.97–1.65, p = 0.086) | 1.36 (1.03–1.80, p = 0.028) | 135 (42.3) | 1.26 (0.95–1.66, p = 0.105) | 1.35 (1.02–1.80, p = 0.038) | |
| Side | Left | 208 (59.6) | - | - | 191 (59.9) | - | - |
| Right | 141 (40.4) | 0.98 (0.75–1.29, p = 0.906) | - | 128 (40.1) | 0.94 (0.71–1.24, p = 0.642) | - | |
| Etiology | PICA | 122 (35.0) | - | - | 114 (35.7) | - | - |
| AICA | 92 (26.4) | 0.92 (0.65–1.30, p = 0.632) | - | 84 (26.3) | 0.93 (0.65–1.33, p = 0.687) | - | |
| AICA PICA | 30 (8.6) | 1.57 (0.93–2.64, p = 0.090) | - | 24 (7.5) | 1.83 (1.05–3.19, p = 0.034) | - | |
| AICA PICA VA | 13 (3.7) | 1.93 (0.95–3.91, p = 0.067) | - | 12 (3.8) | 1.87 (0.90–3.88, p = 0.094) | - | |
| AICA VA | 41 (11.7) | 1.18 (0.77–1.81, p = 0.455) | - | 39 (12.2) | 1.16 (0.75–1.80, p = 0.512) | - | |
| PICA VA | 38 (10.9) | 1.25 (0.79–1.98, p = 0.337) | - | 35 (11.0) | 1.42 (0.89–2.27, p = 0.139) | - | |
| VA | 13 (3.7) | 0.86 (0.41–1.80, p = 0.686) | - | 11 (3.4) | 0.88 (0.40–1.92, p = 0.741) | - | |
| Decompression | Teflon | 323 (92.6) | - | - | 296 (92.8) | - | - |
| Sling | 26 (7.4) | 0.79 (0.47–1.30, p = 0.349) | - | 23 (7.2) | 0.75 (0.44–1.27, p = 0.285) | - | |
| Grooving | No | 246 (70.5) | - | - | 228 (71.5) | - | - |
| Brainstem | 52 (14.9) | 1.63 (1.12–2.39, p = 0.011) | 1.48 (1.01–2.17, p = 0.044) | 46 (14.4) | 1.65 (1.11–2.45, p = 0.013) | 1.48 (1.00–2.21, p = 0.052) | |
| Peripheral | 51 (14.6) | 0.73 (0.49–1.09, p = 0.129) | 0.72 (0.48–1.07, p = 0.105) | 45 (14.1) | 0.77 (0.51–1.17, p = 0.217) | 0.75 (0.50–1.14, p = 0.180) | |
| Facial Palsy | No | 317 (90.8) | - | - | 287 (90.0) | - | - |
| Yes | 32 (9.2) | 1.56 (1.00–2.43, p = 0.048) | 1.44 (0.91–2.28, p = 0.122) | 32 (10.0) | 1.58 (1.01–2.46, p = 0.045) | 1.45 (0.91–2.31, p = 0.115) | |
bNumber in dataframe = 349, Number in model = 349, Missing = 0, Number of events = 269, Concordance = 0.619 (SE = 0.022), R-squared = 0.080( Max possible = 0.993), Likelihood ratio test = 29.252 (df = 6, p = 0.000)
aNumber in dataframe = 319, Number in model = 319, Missing = 0, Number of events = 251, Concordance = 0.617 (SE = 0.022), R-squared = 0.081( Max possible = 0.993), Likelihood ratio test = 27.016 (df = 6, p = 0.000)