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Table 2: Comparison of pre- and posttreatment CTP data for symptomatic and asymptomatic patients^a
Pre- and Posttreatment rCBV (mL/100 g) (mean) P Value dMTT (s) (mean) P Value rCBF (mL/100 g/min) (mean) P Value
Symptomatic patients before treatment (n = 31) 1.02 ± 0.13 1.29 ± 1.21 0.81 ± 0.14 
Symptomatic patients after treatment (n = 31) 0.95 ± 0.14 .036^b 0.14 ± 1.08 <.001^b 0.93 ± 0.17 <.001^b
Asymptomatic patients before treatment (n = 14) 1.03 ± 0.08 0.56 ± 0.66 0.92 ± 0.12 
Asymptomatic patients, after treatment (n = 14) 1.05 ± 0.13 .221 0.06 ± 0.55 0.081 1.03 ± 0.14 .026^b


↵a The significance of the difference between relative perfusion parameters was tested using the paired-samples t test in symptomatic patients and the Wilcoxon signed rank test in asymptomatic patients.


↵b Significant difference with a P value < .05.