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Table 2 The maternal characteristics and 75-g OGTT results during pregnancy in terms of the different diagnostic criteria

From: Risk factors associated with the development of postpartum diabetes in Japanese women with gestational diabetes

Variables All subjects
(n = 306)
Postpartum OGTT
JSOG criteria
(n = 116)
IADPSG Criteria
(n = 190)
P value *
Maternal age (years) 33.0 ± 5.1 33.2 ± 4.8 32.9 ± 5.2 0.52
Nulliparous (%) 136 (44%) 46 (40%) 90 (47%) 0.19
Family history of diabetes (%) 124 (41%) 47 (41%) 77 (41%) 1.0
Pre-pregnancy BMI (kg/m2) 23.5 ± 4.8 24.0 ± 4.9 23.2 ± 4.8 0.14
Pre-pregnancy BMI ≥25 kg/m2 92 (30%) 41 (35%) 52 (27%) 0.14
GA at OGTT (weeks) 24.2 ± 6.7 23.9 ± 7.6 24.4 ± 6.1 0.60
OGTT results during pregnancy
 Fasting PG (mg/dl) 86 ± 10 88 ± 11 85 ± 10 0.0046
 1-h PG (mg/dl) 186 ± 27 197 ± 23 179 ± 26 <0.0001
 2-h PG (mg/dl) 161 ± 26 168 ± 22 156 ± 27 0.0001
 HbA1c (%) 5.5 ± 0.4 (n = 269) 5.5 ± 0.4 (n = 108) 5.5 ± 0.4 (n = 158) 0.94
Insulin therapy during pregnancy (%) 162 (53%) 54 (47%) 108 (58%) 0.057
Weight gain during pregnancy (kg) 7.3 ± 5.1 6.9 ± 5.8 7.5 ± 4.6 0.37
Mean follow-up period (weeks) (median, range) 68 ± 61 (57, 7–292) 83 ± 81 (58, 7–292) 59 ± 43 (57, 7–164) 0.0006
At least two follow-up OGTTs (%) 229 (75%) 81 (70%) 148 (78%) 0.079
More than 12 months of follow-up OGTTs (%) 165 (54%) 61 (53%) 104 (55%) 0.19
Women who developed diabetes (%) 32 (10.5%) 11 (9.5%) 21 (11.1%) 0.66
  1. * P values represent comparisons between the JSOG and IADPSG criteria using Student’s t-test or a chi-squared test
  2. OGTT oral glucose tolerance test, JSOG Japan Society of Obstetrics and Gynecology, IADPSG Internal Association of Diabetes and Pregnancy Study Group, BMI body mass index, GA gestational age, PG plasma glucose