Table 1 Baseline characteristics of women recruited to the GRoW randomised trial who attended for one or more research ultrasounds
Characteristic | Metformin Group N = 255 | Placebo Group N = 256 | Total N = 511 |
|---|---|---|---|
Maternal age (years; mean (SD)) | 29.88 (5.55) | 30.15 (5.38) | 30.02 (5.46) |
Gestational age at trial entry (weeks) Median (IQR) | 16.29 (14.43, 18.00) | 16.21 (14.57, 18.07) | 16.29 (14.43, 18.00) |
BMI (kg/m2) Median (IQR) | 32.40 (28.70, 37.57) | 32.05 (29.10, 36.80) | 32.30 (28.90, 37.20) |
BMI category (kg/m2) N (%): | |||
 BMI 25.0–29.9 | 83 (32.55) | 83 (32.42) | 166 (32.49) |
 BMI 30.0–34.9 | 74 (29.02) | 83 (32.42) | 157 (30.72) |
 BMI 35.0–39.9 | 58 (22.75) | 48 (18.75) | 106 (20.74) |
 BMI ≥ 40.0 | 40 (15.69) | 42 (16.41) | 82 (16.05) |
Nulliparity N (%) | 88 (34.51) | 91 (35.55) | 179 (35.03) |
Smoker N (%) | 24 (9.41) | 43 (16.80) | 67 (13.11) |
Height at trial entry (cm) Mean (SD) | 165.24 (6.76) | 164.89 (6.78) | 165.07 (6.76) |
Weight at trial entry (kg) Mean (SD) | 92.86 (19.79) | 91.87 (19.76) | 92.36 (19.76) |
Ethnicity N(%) | |||
 Caucasian | 209 (81.96) | 219 (85.55) | 428 (83.76) |
 Asian | 5 (1.96) | 7 (2.73) | 12 (2.35) |
 Aboriginal/Torres Strait Islander | 6 (2.35) | 7 (2.73) | 13 (2.54) |
 African | 6 (2.35) | 0 (0.00) | 6 (1.17) |
 Other/unknown | 29 (11.38) | 23 (8.98) | 52 (10.18) |
SEIFA IRSD Quintile N(%) | |||
 Quintile 1 | 75 (29.41) | 93 (36.33) | 168 (32.88) |
 Quintile 2 | 78 (30.59) | 74 (28.91) | 152 (29.75) |
 Quintile 3 | 31 (12.16) | 30 (11.72) | 61 (11.94) |
 Quintile 4 | 52 (20.39) | 43 (16.80) | 95 (18.59) |
 Quintile 5 | 19 (7.45) | 16 (6.25) | 35 (6.85) |