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Table 2

Pregnancy complications and mode of delivery in type 1 diabetic and control pregnancies

Outcome variableProportions (%)
OR (95% CI) for group differences
Type 1 diabetesNondiabetesCrudeAdjusted
PIH 1.6 0.87 1.93 (1.50–2.49) 1.53 (1.18–1.99) 
Preeclampsia, mild 9.7 2.0 5.37 (4.81–6.00) 4.30 (3.83–4.83) 
Preeclampsia, severe 4.3 0.8 5.58 (4.75–6.57) 4.47 (3.77–5.31) 
Cesarean section 46 12 5.85 (5.49–6.25) 5.31 (4.97–5.69) 
Vacuum extraction/forceps 9.6 6.6 1.48 (1.33–1.66) 1.41 (1.25–1.58) 
Outcome variableProportions (%)
OR (95% CI) for group differences
Type 1 diabetesNondiabetesCrudeAdjusted
PIH 1.6 0.87 1.93 (1.50–2.49) 1.53 (1.18–1.99) 
Preeclampsia, mild 9.7 2.0 5.37 (4.81–6.00) 4.30 (3.83–4.83) 
Preeclampsia, severe 4.3 0.8 5.58 (4.75–6.57) 4.47 (3.77–5.31) 
Cesarean section 46 12 5.85 (5.49–6.25) 5.31 (4.97–5.69) 
Vacuum extraction/forceps 9.6 6.6 1.48 (1.33–1.66) 1.41 (1.25–1.58) 

Data are proportions or OR (95% CI). n = 5,089 for diabetic pregnancies; n = 1,260,207 for control pregnancies. Adjusted OR, OR adjusted for group differences in maternal age, BMI, parity, chronic hypertensive disorder, smoking habits, and ethnicity.

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