Table 3

Summary statistics for diabetes diagnosed by HbA1c  compared with diabetes diagnosed by 2-hour OGTT (n=1027)

95% CI
PrevalencePr (A)40.6%37.643.7
SensitivityPr (+|A)84.7%80.888.0
SpecificityPr (−|N)87.2%84.389.8
Area under the ROC(Sens.+Spec.)/20.860.840.88
Likelihood ratio (+)Pr (+|A)/Pr (+|N)6.625.368.18
Likelihood ratio (−)Pr (−|A)/Pr (−|N)0.180.140.22
ORLR (+)/LR (−)37.6226.3453.73
Positive predictive valuePr (A|+)81.9%77.985.4
Negative predictive valuePr (N|−)89.3%86.591.6
  • HbA1c, glycated haemoglobin; OGTT, oral glucose tolerance test; ROC, receiver operating characteristic.