Table 4.

Diagnostic test indices of GGT for predicting premature coronary artery disease in the study population and men and women separately

Population	GGT cut-off	AUC	95% CI	Sensitivity	Specificity	PPV	NPV	Diagnostic accuracy	P-value*
All patients	22.5	80.9	76.5–85.3	80.1	70.2	71.3	79.3	74.9	<0.001
Men	35.5	77.1	76.5–85.3	62.4	86.5	82.1	67	73.3	<0.001
Women	22.5	83.2	77.0–88.2	79.1	80	75.8	82.9	79.6	<0.001

AUC area under the ROC curve, CI confidence interval, GGT gamma-glutamyltransferase, NPV negative predictive value, PPV positive predictive value

*p < 0.05 was considered statistically significant