Table 2.
Predictors for conducting neuroimaging (cCT/cMRI) using logistic regression analysis.
| Univariate | Multivariate | |||
|---|---|---|---|---|
| OR (95% CI) | P-value | OR (95% CI) | P-value | |
| Plasma sodium level | 1.05 (0.98–1.13) | 0.161 | ||
| Gender (female) | 2.15 (1.02–4.51) | 0.042 | 2.49 (0.90–6.93) | 0.079 |
| Age | 1.31 (1.04–1.064) | 0.018 | 1.64 (1.18–2.28) | 0.003 |
| Neurological symptoms | ||||
| Weakness/Confusion | 0.37 (0.17–0.81) | 0.013 | 0.59 (0.21–1.69) | 0.325 |
| Nausea/Vomiting | 0.36 (0.15–0.83) | 0.016 | 0.67 (0.22–2.05) | 0.480 |
| Headache | 4.14 (0.50–34.12) | 0.187 | ||
| Vertigo | 1.30 (0.50–3.38) | 0.587 | ||
| Seizures | 17.0 (2.2–129.40) | 0.006 | 71.7 (7.33–700.6) | <0.001 |
| Altered consciousness | 4.80 (1.06–21.72) | 0.042 | 6.71 (1.14–39.46) | 0.035 |
| Focal neurological signs | 17.43 (4.0–76.11) | 0.001 | 32.95 (6.59–164.7) | <0.001 |
Odds ratios (OR), 95% confidence intervals (CI), and p-values were calculated using logistic regression analysis (backward elimination). Variables were selected a priori based upon theoretical considerations and existing literature. Factors statistically significant at the 10% level in our univariate analysis were then included in our multivariate model. Two-sided p values < 0.05 were considered statistically significant in the multivariate model.