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Statistical analysis of the area of infarct core, penumbra, and perfusion abnormality for 2 CTP analysis software packages
Average Difference ± SD (cm2)Relative Difference ± SD (%)Bland-Altman Limits of Agreement (cm2)Pearson Correlation Coefficient (P value)Slope of Regression Line (P value)
Infarct core−23.6 ± 25.6 (P < .001)−114 ± 94 (P < .001)[−74.8, 27.6]0.62 (<.001)0.78 (<.001)
Penumbra15.8 ± 25.3 (P < .001)31 ± 143 (P = .16)[−34.7, 66.3]0.28 (.07)1.28 (.07)
Perfusion abnormality−7.81 ± 29.6 (P = .10)56 ± 98 (P < .001)[−67.0, 51.4]0.70 (<.001)1.02 (<.001)