Table 2:

Spearman rank ρ (95% CI) of collateral measures with outcomes for all studies and per CTA acquisition phase

	All Studies (N = 442)	Early Arterial (n = 91)	Peak Arterial (n = 56)	Equilibrium (n = 123)	Peak Venous (n = 114)	Late Venous (n = 58)
Follow-up infarct volume
Visual collateral score	−.44 (−.53 to −.36)^{^a}	−.35 (−.55 to −.13)^{^a}	−.46 (−.65 to −.21^{^a}	−.51 (−.64 to −.35)^{^a}	−.49 (−.64 to −.29^{^a}	−.47 (−.66 to −.24)^{^a}
Quantitative collateral score	−.46 (−.54 to −.37)^{^a}	−.45 (−.62 to −.24)^{^a}	−.46 (−.66 to −.19)^{^a}	−.51 (−.65 to −.34)^{^a}	−.41 (−.56 to −.20)^{^a}	−.52 (−.70 to −.29)^{^a}
mRS at 90 days
Visual collateral score	−.31 (−.39 to −.22)^{^a}	−.19 (−.38 to .03)	−.22 (−.49 to −.04)	−.28 (−.49 to −.15)^{^a}	−.29 (−.45 to −.09)^{^a}	−.41 (−.63 to −.19)^{^a}
Quantitative collateral score	−.40 (−.48 to −.32)^{^a}	−.35 (−.53 to −.13)^{^a}	−.34 (−.55 to −.10)^{^a}	−.38 (−.58 to −.25)^{^a}	−.30 (−.42 to −.08)^{^a}	−.37 (−.59 to −.12)^{^a}