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Table 1: Statistics for perfusion metrics for all groups^{^a}
CTP before CTA CTA before CTP CTP with Flank Effect CTP with Corrected Flank Effect
Group A B B flank B corrected flank
No. of cases 368 1563 49 49
Age (yr) 78.0 (18.5) 76.0 (19.0) 83.0 (10.2) 83.0 (10.2)
P = .06 P < .001 P < .001
Time gap (sec) 91.5 (89.5) 62.0 (67.0) 18.0 (4.0) 18.0 (4.0)
P < .001 P < .001 P < .001
Baseline (HU) 41.0 (3.0) 45.0 (4.0) 48.0 (6.2) 45.0 (5.0)
P < .001 P < .001 P = .71
Tmax (sec) 1.7 (0.6) 1.7 (0.5) 2.1 (1.2) 2.0 (0.9)
P = .054 P < .001 P < .001
Core volume (mL) 18.5 (18.0) 18.0 (16.0) 26.0 (38.5) 23.0 (31.0)
P = .43 P = .027 P = .078
Hypoperfusion volume (mL) 44.5 (96.0) 41.0 (76.0) 67.0 (81.8) 53.0 (85.0)
P = .2 P < .001 P < .001
↵a Median values, interquartile range (parentheses), and P values from a Wilcoxon rank sum test are reported.