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Table 2 Sensitivity and specificity as well as positive- and negative predictive values

From: Use of glucometer and fasting blood glucose as screening tools for diabetes mellitus type 2 and glycated haemoglobin as clinical reference in rural community primary care settings of a middle income country

Screening variable Clinical Reference * N
Total
Sensitivity Specificity PPV** NPV**
CBG VPG 669 35/43 (81.4%) 612/626
(97.8%)
35/49
(71.4%)
612/620
(98.7%)
CBG HbA1c 656 31/68
(45.6%)
566/588
(96.3%)
31/53
(58.5%)
566/603
(93.9%)
VPG HbA1c 645 25/63
(39.7%)
563/582
(96.7%)
25/44
(56.8%)
563/601
(93.7%)
  1. *VPG ≥7.0 mmol/L and HbA1c ≥7%.
  2. **PPV Positive predictive value, NPV Negative predictive value.