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Table 2 The effect of antenatal steroids on condition at birth

From: Impact of obstetric interventions on condition at birth in extremely preterm babies: evidence from a national cohort study

    Partial course Full course P-valuea
   N Effect (95 % CI) Effect (95 % CI)  
Confounding only models
  Baseline 1701 5.08 (3.84 – 6.72) 7.24 (5.60 – 9.36)
  Baseline + GA 1701 2.09 (1.51 – 2.90) 2.53 (1.85 – 3.45) <0.001
  ’Clinical’ modelb 1602 1.42 (0.99 – 2.05) 1.64 (1.14 – 2.36) 0.013
  Complete modelc 1602 1.38 (0.93 – 2.03) 1.82 (1.22 – 2.71) <0.001
Models with effect modification by mode of deliveryb, c
  Clinical model: Vaginal delivery 1602 1.61 (1.09 – 2.37) 1.66 (1.13 – 2.44) 0.018
  Clinical model: Caesarean delivery   1.31 (0.46 – 3.69) 0.48 (0.17 – 1.39)  
  Complete model: vaginal delivery   1.84 (1.20 – 2.82) 1.63 (1.08 – 2.47) 0.021
  Complete model: Caesarean delivery   1.23 (0.42 – 3.61) 0.42 (0.14 – 1.26)  
  1. Odds ratios of the effect of antenatal steroids on the presence of a heart rate greater than 100 at minutes of age in the complete population of babies born at 22–26 completed weeks of gestation in England in 2006 who were known to be alive at admission to hospital and at the start of labour monitoring or delivery to perform Caesarean section
  2. aLikelihood ratio test p-value, comparing current to next simplest model described
  3. bThe clinical model for condition at birth was adjusted for: gestational age, tocolysis, mode of delivery, NICU level at birth, in utero transfer, presentation at delivery
  4. cThe complete models were adjusted for the same factors as the clinical models, plus: who the parents were counselled by, what choice was expressed for resuscitation, and whether a decision was made to not perform Caesarean section in the presence of fetal distress