Table 4.

Predictors of cognitive dysfunction at 5 and 7 days postoperatively.

	Univariate analysis	Multivariate logistic regression analysis 5 days postoperatively		Multivariate logistic regression analysis7 days postoperatively
Predictors	P value	OR (95% CI)	P value	OR (95% CI)	P value
Smoking history	0.009	0.833 (0.497‒0.911)	0.006	0.684 (0.583‒0.952)	0.002
Dose of sufentanil	0.026	2.901 (2.127‒16.381)	0.007	1.073 (1.005‒1.632)	0.036
Age	0.001	1.922 (1.057‒2.132)	0.018	2.890 (1.583‒9.581)	0.023
Lower education level	0.039	2.512 (1.603‒15.244)	0.034	3.800 (1.200‒13.493)	0.040
Serum TNF-α concentration	0.001	2.903 (1.572–4.484)	0.042	1.437 (1.206–1.680)	0.027
Anesthesia duration	0.001	1.783 (1.514‒7.366)	0.047
History of general anesthesia	0.001	3.674 (2.496‒4.217)	0.044
History of allergy	0.001
Blood transfusion	0.001

OR, odds ratio; CI, confidence interval; TNF-α, tumor necrosis factor-α.