Table 1

Sample characteristics
Characteristic Study sample, n=974a Excludedb, n=57a Total cohort, n=1031a
Range
Gestational weeks 15.8 (1.3) 12.1-22.0 16.0 (1.4) 15.8 (1.3)
Age 31 (4) 19-42 31 (4) 31 (4)
Para 0 517 (54%) 28 (50%) 545 (53%)
Daily smokerc 27 (3%) 1 (2%) 28 (3%)
Height (cm) 169 (6) 150-184 169 (6) 169 (6)
Weight (kg) 69.9 (12.0) 44.6-123.1 68.2 (12.5) 69.8 (12.0)
BMI (kg/m2) 24.5 (3.9) 17.2-44.0 23.4 (3.8) 24.5 (3.9)
Birth weightd (g) 3588 (570) 600-5420 3554 (671) 3586 (576)
Blood glucose (mmol/l), first trimester
Fasting 4.0 (0.4) 2.6-5.3 4.0 (0.4)
30 min 5.7 (1.2) 2.5-9.7 5.7 (1.2)
60 min 5.0 (1.4) 2.0-10.9 4.9 (1.4)
90 min 4.5 (1.2) 2.0-10.1 4.5 (1.2)
2 h 4.1 (1.1) 1.2-7.8 4.1 (1.1)
GDMe: 2-h value≥7.8 mmol/l 3 (0.3%) 3 (0.3%)
Blood glucose (mmol/l), third trimester
2 h 5.5 (1.3) 1.9-10.3 5.5 (1.3)
GDMe: 2-h value≥7.8 mmol/l 51 (5.5%) 54 (5.5%)

Data are mean (SD) or frequency (%).

a Numbers may not add up to total due to missing data for some variables.

b Women excluded due to incomplete OGTT data.

c ≥1 cigarette/day.

d Birth weight of offspring.

e Gestational diabetes mellitus.

Frøslie et al.

Frøslie et al. BMC Medical Research Methodology 2013 13:6   doi:10.1186/1471-2288-13-6

Open Data