TABLE 4.

Comparison of discriminant and reclassification capacities of each model for predicting atrial fibrillation (AF) recurrence.

			Relative IDI		Categorical NRI
	AUC	P-value	IDI (95% CI)	P-value	NRI (95% CI)	P-value
Traditional risk model	0.689	Reference	Reference		Reference
Clinical model 5 (traditional risk model + FIB-4 risk categories)	0.729	0.017	0.056 (0.021∼0.102)	<0.001	0.153 (0.050∼0.255)	0.003
Clinical model 6 (traditional risk model + NFS risk categories)	0.715	0.063	0.032 (0.008∼0.073)	0.006	0.103 (0.003∼0.203)	0.043

Three predictive models were constructed as follows: traditional risk model included age, hypertension, duration of AF, persistent AF, LAD, CHA2DS2-VASc score, and BMI; Clinical model 4 included a combination of traditional risk model and FIB-4 risk categories; Clinical model 5 included a combination of traditional risk model and NFS risk categories. AF, atrial fibrillation; LAD, left atrial diameter; BMI, body mass index; FIB-4, fibrosis-4; NFS, non-alcoholic fatty liver disease fibrosis score; AUC, area under the receiver operating characteristic curve; CI, confidence interval; IDI, integrated discrimination improvement; NRI, net reclassification improvement.