Table 4.

Univariate and multivariate logistic regression analyses of independent parameters for atrial fibrillation.

	Univariate		Multivariate
Variables	Odds ratio (95% CI)	P-value	Odds ratio (95% CI)	P-value
Age	1.062 (1.015-1.111)	0.009	1.013 (0.961-1.069)	0.621
Postoperative QTc	1.147 (1.064-1.238)	0.001	1.093 (1.063-1.122)	0.001
Preoperative QTc	0.973 (0.905-1.045)	0.448
Postoperative QT	0.994 (0.980-1.009)	0.438
Preoperative QT	0.992 (0.968-1.017)	0.540
LVEF	0.979 (0.921-1.041)	0.500
LA diameter	1.095 (0.997-1.203)	0.058
Total drainage	0.999 (0.997-1.002)	0.564

CI=confidence interval; LA=left atrial; LVEF=left ventricular ejection fraction; QTc=corrected QT interval