Table 2.

Correlation between preprocedural (pre) cerebral hemodynamics and cognitive function

r (P)	CBF at rest (Pre)	CVR (Pre)
Full-scale IQ (Pre)	0.51 (0.04*)	0.20 (0.45)
Verbal IQ (Pre)	0.45 (0.08)	0.23 (0.39)
Performance IQ (Pre)	0.56 (0.02*)	0.18 (0.50)
Verbal Comprehension Index (Pre)	0.51 (0.06)	0.28 (0.33)
Perceptual Organization Index (Pre)	0.49 (0.07)	0.01 (0.98)
Working Memory Index (Pre)	0.35 (0.22)	0.26 (0.37)
Processing Speed Index (Pre)	0.52 (0.07)	0.25 (0.42)

^*P <0.05. CBF, cerebral blood flow; CVR, cerebrovascular reserve; IQ, Intelligence Quotient.