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Table 1

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

Type 1 diabetesControl
n 5,089 1,260,207 
Nordic origin (%) 92.6 86.8 
Maternal age (years) 29.6 ± 5.1 29.0 ± 5.1 
Primapara (%) 44.5 42.4 
Height (cm) 166 ± 6.3 166 ± 6.2 
Prepregnancy weight (kg) 71.4 ± 13.4 66.5 ± 12.1 
Prepregnancy BMI (kg/m225.9 ± 4.6 24.0 ± 4.1 
Chronic hypertensive disease (%) 2.1 0.24 
No smoking in pregnancy (%) 82.0 83.8 
Smoking   
    <10 cigarettes /day (%) 10.9 10.6 
    ≥10 cigarettes/day (%) 7.1 5.6 
Type 1 diabetesControl
n 5,089 1,260,207 
Nordic origin (%) 92.6 86.8 
Maternal age (years) 29.6 ± 5.1 29.0 ± 5.1 
Primapara (%) 44.5 42.4 
Height (cm) 166 ± 6.3 166 ± 6.2 
Prepregnancy weight (kg) 71.4 ± 13.4 66.5 ± 12.1 
Prepregnancy BMI (kg/m225.9 ± 4.6 24.0 ± 4.1 
Chronic hypertensive disease (%) 2.1 0.24 
No smoking in pregnancy (%) 82.0 83.8 
Smoking   
    <10 cigarettes /day (%) 10.9 10.6 
    ≥10 cigarettes/day (%) 7.1 5.6 

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).

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