Table 2—

Performance of DRS and FBG, alone or in combination, for the identification of diabetes and glucose abnormalities (diabetes or IGT)

SensitivitySpecificityPositive predictive valueNegative predictive valuePositive likelihood ratioNegative likelihood ratio
Diabetes
    DRS >90.86 (0.82–0.91)0.41 (0.38–0.44)0.23 (0.21–0.26)0.93 (0.91–0.96)1.45 (1.35–1.56)0.34 (0.25–0.47)
    FBG ≥5.6 mmol/l0.97 (0.95–0.99)0.38 (0.35–0.41)0.25 (0.22–0.28)0.98 (0.97–1.0)1.57 (1.49–1.65)0.08 (0.04–0.16)
    FBG ≥6.1 mmol/l0.92 (0.88–0.95)0.68 (0.65–0.71)0.38 (0.34–0.41)0.97 (0.96–0.99)2.86 (2.61–3.14)0.12 (0.08–0.12)
    DRS + FBG ≥6.1 mmol/l
        Both positive0.79 (0.74–0.84)0.78 (0.76–0.81)0.43 (0.39–0.48)0.95 (0.93–0.96)3.63 (3.19–4.12)0.27 (0.21–0.34)
        Both negative0.99 (0.97–1.00)0.30 (0.28–0.33)0.23 (0.20–0.26)0.99 (0.98–1.00)1.42 (1.36–1.48)0.04 (0.01–0.13)
    DRS + FBG ≥5.6 mmol/l
        Both positive0.83 (0.79–0.88)0.59 (0.56–0.62)0.30 (0.27–0.34)0.94 (0.93–0.96)2.04 (1.87–2.23)0.28 (0.21–0.38)
        Both negative1.000.20 (0.17–0.22)0.21 (0.18–0.23)1.001.25 (1.21–1.28)0
Diabetes or IGT
    DRS >90.77 (0.74–0.81)0.45 (0.41–0.48)0.48 (0.44–0.51)0.76 (0.71–0.79)1.40 (1.29–1.51)0.51 (0.43–0.61)
    FBG ≥5.6 mmol/l0.86 (0.84–0.89)0.44 (0.41–0.48)0.50 (0.47–0.54)0.83 (0.8–0.87)1.55 (1.45–1.67)0.3 (0.24–0.38)
    FBG ≥6.1 mmol/l0.68 (0.64–0.72)0.75 (0.72–0.78)0.64 (0.60–0.68)0.78 (0.75–0.81)2.68 (2.35–3.05)0.43 (0.37–0.49)
    DRS + FBG ≥6.1 mmol/l
        Both positive0.55 (0.51–0.59)0.84 (0.81–0.86)0.69 (0.64–0.73)0.74 (0.71–0.77)3.35 (2.83–3.98)0.54 (0.49–0.59)
        Both negative0.90 (0.88–0.93)0.78 (0.76–0.81)0.48 (0.45–0.51)0.85 (0.81–0.89)1.40 (1.32–1.49)0.27 (0.21–0.36)
    DRS + FBG ≥5.6 mmol/l
        Both positive0.69 (0.65–0.73)0.65 (0.62–0.69)0.56 (0.53–0.60)0.76 (0.73–0.79)1.98 (1.78–2.21)0.48 (0.42–0.55)
        Both negative0.95 (0.93–0.97)0.24 (0.21–0.27)0.55 (0.42–0.48)0.88 (0.84–0.92)1.24 (1.19–1.30)0.21 (0.14–0.31)
  • Data are value (95% CI).