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Table 1 Characteristics of the nationwide cohort and the regional cohort

From: Maternal hypothyroidism and the risk of preeclampsia: a Danish national and regional study

  1. Abbreviations: BMI body mass index
  2. aMissing values not included (sex of the child n = 438; birth weight n = 8,867; parity n = 13,578; origin n = 238; smoking n = 21,507)
  3. bGestational age at birth < 37 full weeks and zero days (37+0). cBirth weight < 2500 grams. dData only available from 2004 and onwards (Missing values BMI n = 340,977)