Table 6.

Paired comparison results of variables with significant cutoff values after ROC analysis.

		N	Mean	Standard deviation	Min.	Max.	*P-value
Preoperative QT	AF (+)	130	407,4923	27,11281	290	510	< 0,001
	AF (-)	37	438,5135	45,84431	348	538
	Total	167	414,3653	34,55454	290	538
Preoperative QTc	AF (+)	130	419,1154	14,52271	374	474	< 0,001
	AF (-)	37	448,4865	26,62666	389	491
	Total	167	425,6228	21,61788	374	491
Postoperative QT	AF (+)	130	416,3	48,32363	168	592	0,011
	AF (-)	37	439,2162	45,82463	322	537
	Total	167	421,3772	48,59218	168	592
Postoperative QTc	AF (+)	130	419,8	12,48093	380	462	<0,001
	AF (-)	37	452	23,29998	401	486
	Total	167	426,9341	20,46188	380	486

^*Significance levels according to independent t-test results.

AF=atrial fibrillation; QTc=corrected QT interval; ROC=receiver operating characteristic