Table 2.

Optimal cut-off point based on AF recurrence.

	Median value	Range	AUC	Cut-off value
IS (μg/mL)	0.36	0–1.74	0.576	0.65
IAA (μg/mL)	0.13	0.04–0.56	0.522	0.17

AF, atrial fibrillation; AUC; area under the curve, IAA, indole-3 acetic acid; IS, indoxyl sulphate.