Table 2

Performance measures of HbA1c ≥5.7%

GDMIGDM
Apparent prevalence0.10 (0.07 to 0.15)0.10 (0.07 to 0.15)
True prevalence0.38 (0.32 to 0.45)0.27 (0.21 to 0.33)
Sensitivity0.20 (0.12 to 0.30)0.25 (0.15 to 0.38)
Specificity0.96 (0.91 to 0.98)0.95 (0.90 to 0.98)
Positive predictive value0.74 (0.52 to 0.90)0.65 (0.43 to 0.84)
Negative predictive value0.66 (0.59 to 0.73)0.78 (0.71 to 0.83)
  • Data are statistical performance measures and 95% CIs.

  • GDM, gestational diabetes mellitus; HbA1c, hemoglobin A1c; IGDM, insulin-treated gestational diabetes mellitus.