Ceruloplasmin, a reliable marker of fibrosis in chronic hepatitis B virus patients with normal or minimally raised alanine aminotransferase

Table 4 Summary of CG model validity in training and validation groups

Variable	Training group (n = 97)		Validation group (n = 96)
	F = 4	F ≥ 2	F = 4	F ≥ 2
AUC	0.84	0.797	0.792	0.778
Sensitivity	83.10%	83.30%	74.70%	79.40%
Specificity	78.60%	67.30%	88.20%	67.70%
PPV	39.60%	76.94%	57.70%	76.29%
NPV	96.50%	75.48%	94.20%	71.51%

AUC: Area under the receiver operating characteristic curve; NPV: Negative predictive value; PPV: Positive predictive value.