Table 4.
Uni- and multivariate analysis for risk factors influencing the ETVSS for patients treated with ETV.
| variable | odds ratio | 95% CI | p value |
|---|---|---|---|
| Univariate analysis | |||
| Evans index | 0.06 | 0.2 - 0.7 | 0.9 |
| Diameter “clivus-basilar artery” | 5.9 | −0.2 - 6.11 | 0.2 |
| Age | 4.3 | −53.4 - 44.4 | 0.04 |
| Sex (m vs. f) | 0.4 | −0.2 - 2.65 | 0.5 |
| Pre-OP symptoms | |||
| Headache | 0.04 | 0.02 - 1.0 | 0.8 |
| Nausea | 0.6 | −0.09 - 0.6 | 0.4 |
| Cognitive impairment | 0.002 | −0.002 - 1.0 | 0.9 |
| Seizures | 0.06 | −0.1 - 0.3 | 0.8 |
| Gait disorder | 0.7 | −0.2 - 0.8 | 0.4 |
| Visual abnormalities | 2.2 | 0.2 - 3.2 | 0.1 |
| Urinary incontinence | 1.2 | −0.1 - 1.4 | 0.7 |
| Multivariate analysis | |||
| Age | 1.1 | −0.8 - 2.7 | 0.3 |
| Sex (m vs. f) | 3.0 | 0.06 - 3.2 | 0.06 - 3.2 |