Random glucose test

1-h 50-g glucose challenge test

 

OGTT Positive

OGTT Negative

OGTT
unverified

Total

OGTT
Negative

OGTT
positive

OGTT
unverified

Total

Positive Screening test

7

30

0

37

33

134

0

167

Negative  Screening test

41

1223

0

1264

14

1100

0

1114

Total

48

1253

0

1301

47

1234

0

1281

Sensitivity (%)

14.6 (4.6–24.6)

70.2 (57.1–83.3)

Specificity (%)

97.6 (96.6–98.5)

89.1 (87.4–90.9)

PPV (%)

18.9 (6.3–31.5)

19.8 (3.7–25.8)

NPV (%)

96.8 (91.0–100.0)

98.7 (97.1–100.0)

LR (+ test result)

6.1 (2.8–13.2)

6.5 (5.1–8.3)

LR (– test result)

0.88 (0.78–0.98)

0.33 (0.22–0.52)

DOR

7.0 (2.9–16.8)

19.4 (6.8–31.9)

Area under the curve

0.69 (0.61–0.78)

0.88 (0.83–0.93)

Table 4: Results of the 2×2 table and accuracy measures calculated after correction for verification bias.