Fig 1.
Flowchart of the study population.
Table 1.
Characteristics of the study population (n = 3671).
Table 2.
Pregnancy outcomes in the study population (n = 3671).
Fig 2.
The rate of pregnancy outcomes and number of events per maternal prepregnancy body mass index (BMI) category.
The height of the grey bars indicate the rate of pregnancy outcomes per BMI category (the number of events per BMI category divided by the total number of subjects within that BMI category; expressed as a percentage). The number in the grey bars represents the number of events per maternal prepregnancy body mass index (BMI) category. Adverse maternal outcome (composite): pregnancy-induced hypertension, preeclampsia, gestational diabetes mellitus, thromboembolic event, eclampsia, maternal death. Adverse neonatal outcome (composite): preterm birth (gestational age <37 weeks), small-for-gestational-age (<10th birthweight percentile), large-for-gestational-age (>90th birthweight percentile), neonatal intensive care admission, Apgar-score <7 after 5 minutes, pH <7.0 in arterial cord blood, congenital anomalies, perinatal death. Adverse pregnancy outcome (composite): adverse maternal and/or neonatal outcome.
Table 3.
Pregnancy outcomes per maternal prepregnancy BMI category (n = 3671).
Table 4.
Associations between maternal prepregnancy BMI as a continuous variable and adverse pregnancy outcomes in a subpopulation of women with a BMI within the reference interval (18.5–24.9 kg/m2).