Table 2 Proportion of women with gestational diabetes and with prediabetes before pregnancy

Gestational diabetes identified anytime during pregnancy

n = 2244*

Defined as OGTT > 140 mg/dL1

430 (19.2)

17.6 to 20.9

Defined as OGTT > 152.9 mg/dL2

233 (10.4)

9.2 to 11.7

Gestational diabetes identified during first trimester pregnancy (Early abnormality)

n = 1986*

Defined as OGTT > 140 mg/dL1

112 (5.6)

4.7 to 6.7

Defined as OGTT > 152.9 mg/dL2

69 (3.5)

2.7 to 4.4

Gestational diabetes identified during second or third trimester pregnancy (Late abnormality)

n = 2132*

Defined as OGTT > 140 mg/dL1

Defined as OGTT > 152.9 mg/dL2

318 (14.9)

n = 2175*

164 (7.5)

13.4 to 16.5

6.5 to 8.7

HbA1c status at the time of identification of pregnancy

n = 1854**

<  5.7

1800 (97.1)

96.2 to 97.8

5.7 to 6.4

50 (2.7)

2.0 to 3.5

>  6.4

4 (0.2)

0.06 to 0.5