Table 1

Maternal characteristics in type 1 diabetes and the general obstetric population in Sweden 1991–2003

Type 1 diabetesControl
n5,0891,260,207
Nordic origin (%)92.686.8
Maternal age (years)29.6 ± 5.129.0 ± 5.1
Primapara (%)44.542.4
Height (cm)166 ± 6.3166 ± 6.2
Prepregnancy weight (kg)71.4 ± 13.466.5 ± 12.1
Prepregnancy BMI (kg/m2)25.9 ± 4.624.0 ± 4.1
Chronic hypertensive disease (%)2.10.24
No smoking in pregnancy (%)82.083.8
Smoking
    <10 cigarettes /day (%)10.910.6
    ≥10 cigarettes/day (%)7.15.6
  • Data are means ± SD or proportions in %. With the exception of maternal height, all differences between type 1 diabetic and control women are statistically significant with P < 0.001 (Student t test or χ2 test).