Table 5.
Multicollinearity diagnostics for candidate predictors included in the multivariable model.
| Predictor | Tolerance | VIF | Interpretation |
|---|---|---|---|
| Age | 0.704 | 1.42 | No important multicollinearity |
| Sex, male | 0.909 | 1.10 | No important multicollinearity |
| Baseline NIHSS score | 0.595 | 1.68 | No important multicollinearity |
| Baseline systolic blood pressure | 0.806 | 1.24 | No important multicollinearity |
| ASPECTS | 0.629 | 1.59 | No important multicollinearity |
| Atrial fibrillation | 0.730 | 1.37 | No important multicollinearity |
| Pre-stroke antiplatelet use | 0.847 | 1.18 | No important multicollinearity |
| WBC count | 0.289 | 3.46 | Moderate correlation, below threshold |
| Neutrophil count | 0.238 | 4.21 | Highest VIF, below threshold |
| Lymphocyte count | 0.581 | 1.72 | No important multicollinearity |
| Hemoglobin | 0.763 | 1.31 | No important multicollinearity |
| INR | 0.820 | 1.22 | No important multicollinearity |
| Fibrinogen | 0.735 | 1.36 | No important multicollinearity |
| D-dimer | 0.671 | 1.49 | No important multicollinearity |
VIF ≥5 or tolerance ≤0.20 was considered suggestive of potentially important multicollinearity.
ASPECTS = Alberta Stroke Program Early CT Score, INR = international normalized ratio, NIHSS = National Institutes of Health Stroke Scale, VIF = variance inflation factor, WBC = white blood cell.