Table 1 —

Univariate associations between recurrence of GDM and factors from the index and subsequent pregnancy

Variablen*Recurrence of GDM n (%)RR (unadjusted)95% CI
Prepregnancy weight: index pregnancy
 <120 lb10830 (27.8)1.00
 120–149 lb19060 (31.6)1.14(0.79–1.64)
 150–189 lb16355 (33.7)1.21(0.84–1.76)
 ≥190 lb8644 (51.2)1.84(1.28–2.66)
Prepregnancy weight: subsequent pregnancy
 <120 lb8322 (26.5)1.00
 120–149 lb20662 (30.1)1.14(0.75–1.72)
 150–189 lb15856 (35.4)1.34(0.88–2.03)
 ≥190 lb11357 (50.4)1.90(1.27–2.85)
Birth weight: index pregnancy
 2,500–3,999 g473152 (32.1)1.00
 <2,500 g3912 (30.8)0.96(0.59–1.56)
 ≥4,000 g13968 (48.9)1.52(1.23–1.89)
Breast-feeding: index pregnancy
 Yes347117 (33.7)1.00
 No293109 (37.2)1.10(0.89–1.36)
Predelivery weight: index pregnancy
 <145 lb8321 (25.3)1.00
 145–179 lb19759 (29.9)1.18(0.77–1.81)
 180–219 lb17868 (38.2)1.51(1.00–2.28)
 ≥220 lb8238 (46.3)1.83(1.18–2.84)
Predelivery weight: subsequent pregnancy
 <145 lb7520 (26.7)1.00
 145–179 lb20467 (32.8)1.23(0.81–1.88)
 180–219 lb17662 (35.2)1.32(0.86–202)
 ≥220 lb9747 (48.5)1.82(1.18–2.79)
Smoking: index pregnancy
 No396139 (35.1)1.00
 Yes16661 (36.7)1.05(0.82–1.33)
Weight change between pregnancies
 <0 lb14148 (34.0)1.00
 0–4 lb10336 (35.0)1.03(0.72–1.46)
 5–19 lb17453 (30.5)0.89(0.65–1.23)
 ≥20 lb7230 (41.7)1.22(0.86–1.75)
Weight gain during pregnancy: index pregnancy
 <15 lb5825 (43.1)1.00
 15–29 lb21076 (36.2)0.84(0.59–1.19)
 30–44 lb17959 (33.0)0.76(0.53–1.10)
 ≥45 lb7418 (24.3)0.56(0.34–0.93)
  • *

    * Numbers do not add up to total for some factors because of missing values.