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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