Table 1—

Characteristics of women with a history of GDM by postpartum glucose screening status: KPNC GDM registry: 1995–2006

Without postpartum glucose screeningWith postpartum glucose screeningP
n8,9245,524
Age (years)<0.0001
    <259.45.4
    25–3564.163.0
    ≥3626.631.6
Race/ethnicity<0.0001
    Non-Hispanic white34.828.0
    African American5.63.2
    Asian23.231.3
    Hispanic24.627.1
    Other4.85.6
    Unknown7.04.8
Education<0.0001
    Less than high school12.211.7
    High school graduate29.924.4
    2-year college23.420.9
    4-year college21.526.4
    Postgraduate degree11.315.2
    Unknown1.81.5
Annual household income0.0003
    <$30,0006.64.4
    $30,000–59,00043.338.0
    $60,000–99,00039.844.5
    ≥$100,0004.96.8
    Unknown5.46.3
Parity0.0003
    037.440.4
    132.532.8
    ≥230.126.8
Obese10.48.9<0.0001
Gestational age at GDM diagnosis (weeks)<0.0001
    <208.413.7
    20–243.94.8
    25–3057.263.9
    31–3726.414.0
    ≥380.70.2
    Unknown3.53.4
Plasma glucose at the 100-g OGTT
    Fasting0.29
        <95 mg/dl58.058.0
        ≥95 but <105 mg/dl20.321.2
        ≥105 mg/dl21.720.9
    1-h0.16
        <180 mg/dl10.59.6
        ≥180 but <190 mg/dl5.95.7
        ≥190 mg/dl83.584.6
    2-h0.85
        <155 mg/dl5.55.4
        ≥155 but <165 mg/dl3.33.2
        ≥165 mg/dl91.191.4
    3-h0.99
        <140 mg/dl46.746.7
        ≥140 but <145 mg/dl4.44.4
        ≥145 mg/dl49.049.0
Diabetes medication during pregnancy
    Insulin12.615.2<0.0001
    Glyburide6.413.9<0.0001
Macrosomic infant delivered15.513.80.014