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Table 4 Sensitivity, specificity, PPV, and NPV for CBG and HbA1c vs. VPG based on cut points defined by ROC curve analysis

From: Performance of diabetes screening tests: an evaluation study of Iranian diabetes screening program

Screening test

Reference

n

Sensitivity

Specificity

PPV

NPV

CBG

VPG

1057

57/71 (80.28%)

879/986 (89.14%)

57/164 (34.75%)

879/893 (98.43%)

HbA1c

VPG

1057

55/71 (77.46%)

929/986 (94.21%)

55/112 (49.10%)

929/945 (98.30%)

Pa

  

0.001

0.001

  
  1. CBG ≥ 116.50(mg/dl); VPG ≥ 126 (mg/dl) and clinical diagnosis
  2. PPV positive predictive value, NPV negative predictive value
  3. HbA1c ≥ 7.15; acompared with indexes based on WHO’s recommendation cut points (CBG ≥ 126 mg/dl and HbA1c ≥ 6.5%)
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Diabetology & Metabolic Syndrome

ISSN: 1758-5996

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