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Table 2 Sensitivity, specificity, positive likelihood ratio, and negative likelihood ratio for detecting selected type 2 diabetes mellitus at different HbA1c thresholds

From: Performance of HbA1c versus oral glucose tolerance test (OGTT) as a screening tool to diagnose dysglycemic status in high-risk Thai patients

HbA1c (%NGSP)) Sensitivity Specificity Positive Likelihood Ratio Negative Likelihood Ratio Youden’s Index
5.7 78% (70–86%) 48% (43–53%) 1.51 (1.31–1.73) 0.45 (0.31–0.66) 0.264
5.8 74% (66–83%) 58% (53–62%) 1.75 (1.49–2.06) 0.45 (0.32–0.63) 0.319
5.9 69% (60–78%) 65% (60–69%) 1.96 (1.63–2.36) 0.47 (0.35–0.64) 0.340
6.0 63% (54–73%) 72% (67–76%) 2.25 (1.81–2.78) 0.51 (0.39–0.66) 0.351
6.1 57% (48–67%) 79% (75–83%) 2.68 (2.09–3.44) 0.54 (0.43–0.68) 0.360
6.2 54% (45–64%) 85% (81–88%) 3.55 (2.66–4.74) 0.54 (0.43–0.67) 0.391
6.3 46% (36–55%) 89% (86–92%) 4.07 (2.80–5.75) 0.61 (0.51–0.74) 0.344
6.4 38% (28–47%) 91% (89–94%) 4.42 (2.95–6.62) 0.68 (0.58–0.80) 0.291
6.5 32% (23–41%) 94% (92–96%) 5.21 (3.24–8.38) 0.73 (0.64–0.83) 0.256