Table 2. Median regression for infarct growth between baseline and days 3–5 of imaging.

	Absolute growth				Relative growth
Parameter	Univariate	Model 1, r2=0.51	Model 2, r2=0.36	Model 3, r2=0.52	Univariate	Model 1, r2=0.42	Model 2, r2=0.24	Model 3, r2=0.44
Reperfusion (%)	β −72.2, P<0.001	β −48.5, P<0.001	β −46.8, P<0.001	β −48.9, P<0.001	β −0.14, P<0.001	β −0.15, P<0.001	β −0.44, P<0.001	β −0.15, P<0.001
Mismatch volume (mL)	β 0.47, P=0.03	β 0.40, P=0.001		β 0.40, P=0.002	β 0.001, P=0.003	β 0.001, P=0.03		β 0.001, P=0.05
Mismatch%	β −42.2, P=0.06				β 0.14, P=0.06
Baseline DWI (mL)	β 0.59, P<0.001	β 0.40, P<0.001		β 0.34, P=0.01	β −0.05, P=0.13	β −0.001, P<0.001		β −0.01, P=0.07
Baseline collateral grade	β −21.4, P<0.001		β −11.7, P=0.03	β −3.32, P=0.47	β 0.04, P=0.07		β 0.29, P=0.006	β −0.004, P=0.85

DWI, diffusion weighted imaging; β, co-efficient (relative growth transformed by the 5^th root).

Model 1=best mismatch model, Model 2=best collateral model, Model 3=combined mismatch and collateral model.