Table 3.

Logistic regression analysis to identify factors affecting postoperative atrial fibrillation.

Variables	Univariate analysis			Multivariate analysis
	P-value	Exp (B)	95% CI	P-value	Exp (B)	95% CI
		Odds ratio	Lower-upper		Odds ratio	Lower-upper
Age	< 0.001	1.151	1.008-1.244	0.009a	1.084a	1.010-1-176a
				0.012b	1.078b	1.008-1.194b
Hypertension	0.026	0.824	0.756-0.978	0.096a	0.876a	0.794-1.100a
				0.112b	0.914b	0.678-1.145b
COPD	0.023	0.653	0.312-0.776	0.048a	0.798a	0.664-0.928a
				0.114b	0.678b	0.479-1.217b
Triglyceride	0.064	0.897	0.674-1.010	--	--	--
Lymphocyte	0.010	0.396	0.294-0.804	--	--	--
				0.032b	0.412b	0.374-0.778b
CRP	0.028	1.050	1.008-1.212	0.108a	1.090a	0.928-1.234a
				0.176b	1.078b	0.879-1.194b
PNI	0.002	1.024	1.010-1.196	0.011a	1.052a	1.015-1.379a
VAI	< 0.001	1.412	1.186-1.697	< 0.001b	1.516b	1.314-2.154b

^aMultivariate analysis Model 1 (the goodness of fit of the model was confirmed by a P-value of 0.695 in the Hosmer-Lemeshow test)

^bMultivariate analysis Model 2 (the goodness of fit of the model was confirmed by a P-value of 0.741 in the Hosmer-Lemeshow test)

CI=confidence interval; COPD=chronic obstructive pulmonary disease; CRP=C-reactive protein; PNI=prognostic nutritional index; VAI=visceral adiposity index