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FIG 4. Comparisons of patient age, pretreatment ipsilateral CVR, and asymmetry index (AI) between the hyperperfusion (HP) and nonhyperperfusion (non-HP) groups. Univariate analysis demonstrated significant differences between the groups for age (78.3 ± 4.16 vs 66.7 ± 7.8 years) A, pretreatment ipsilateral CVR (6.3% ± 5.7 vs 40.3% ± 20.1) B, and asymmetry index (70.2% ± 25.2 vs 91.1% ± 14.1). Asterisk indicates P < .05; double asterisk, P < .01.
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