Results of adjusted and unadjusted regression analyses for the effect of collateral capacity on follow-up infarct volume
| Adjusted | Unadjusted | |||||
|---|---|---|---|---|---|---|
| β Log-Transformed (95% CI)a | Exp. (β)b | P Value | β Log-Transformed (95% CI)a | Exp. (β)b | P Value | |
| Visual collateral score per 1 point | −0.49 (−0.61 to −0.37) | 0.60 | <.001 | −0.59 (−0.71 to −0.47) | 0.54 | <.001 |
| Quantitative collateral score per 10% | −0.13 (−0.16 to −0.099) | 0.88 | <.001 | −0.14 (−0.18 to −0.11) | 0.87 | <.001 |
Note:—Exp. (β) indicates exponent of β.
↵a Due to the non-normal distribution of follow-up infarct volume, a log +1 transformation was performed to best fit the assumptions associated with the linear regression model.
↵b Exponent of β was calculated to determine the relative difference of follow-up infarct volume with an increase in collateral scores.