Table. 2.

Comparison of the Difference of Accuracy by Age Group in Fibrosis Prediction: F3 or More

Score	Age	FIB-4 index Cutoff: 1.63		FIB-3 index Cutoff: 1.89
		Accuracy: estimate value (95% CI)	Difference	Accuracy: estimate value (95% CI)	Difference
Training cohort	All	0.706 (0.672–0.739)		0.702 (0.668–0.735)
	≥60	0.579 (0.517–0.639)	0.199	0.613 (0.551–0.672)	0.140
	<60	0.778 (0.738–0.815)		0.753 (0.711–0.791)
Validation cohort	All	0.722 (0.670–0.770)		0.704 (0.651–0.753)
	≥60	0.526 (0.438–0.612)	0.336	0.600 (0.512–0.683)	0.178
	<60	0.862 (0.805–0.908)		0.778 (0.712–0.835)

The difference in the FIB-3 index is shown in bold to indicate that the difference in ACCURACY between those aged 60 and over and those aged under 60 is smaller for the FIB-3 index than for the FIB-4 index.

CI, confidential interval.