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Table 2 Estimated absolute risk of gestational age at delivery categories according to BMI category using original (non-imputed) and imputed data

From: Maternal obesity classes, preterm and post-term birth: a retrospective analysis of 479,864 births in England

  1. # 2087 (0.4%) with missing gestational age were excluded. Total including extreme preterm births 20-27 weeks gestation. NOTE: Frequencies for the imputed data were estimated from the imputed percentages, and therefore may not sum exactly due to rounding errors