Table 6. Diagnostic accuracy measuring of our new index in diagnosing β-thalassemia carrier status.

PPV: Positive predictive value, NPV: Negative predictive value.

Parameter	Cutoff	Sensitivity	Specificity	Accuracy	PPV	NPV	Youden’s index
Momani index	≤ -0.2394	78.6	71.5	72.3	23.6	96.8	50.1