Table 2.

Pearson’s Univariate Correlation between Demographic and Perioperative Variables and Composite Z scores at 1 Day and 1 Month

	1 Day		1 Month
Test	Coefficient	P	Coefficient	P
Age	−0.22	0.15	0.23	0.20
Hypertension	−0.15	0.33	−0.17	0.35
Diabetes mellitus	0.03	0.85	0.04	0.81
Hypercholesterolemia	0.06	0.68	0.10	0.61
Obesity	0.02	0.91	−0.06	0.75
History of smoking	0.03	0.86	−0.26	0.15
Previous CVA	0.21	0.18	0.09	0.63
Years of education	0.31	0.04*	0.02	0.91
Duration of surgery	−0.12	0.41	−0.41	0.02*
Wong/Baker FACES rating
Baseline	0.16	0.28	0.24	0.19
1 day	−0.26	0.08*	—	—
1 month	—	—	0.17	0.35

^*P < 0.10, thus variable is to be included in multivariate linear regression models of composite Z score.

CVA = cerebrovascular accident.