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Table 2 Bias assessment in a systematic review/meta-analyses on the safest mode of delivery for extremely preterm cephalic/non-cephalic twin pairs

From: What is the safest mode of delivery for extremely preterm cephalic/non-cephalic twin pairs? A systematic review and meta-analyses

Study ID Author, Year, Country Total Selection Outcome Comparability
Representativeness of the exposed cohort Selection of the non- exposed cohort Assessment of outcome Adequacy of follow up of cohorts Emergent caesarean for fetal distress Clinical Chorioamnionitis Outborn Status ANCS
Boukerrou, 2011 France 3/8
Barzilay, 2015 Israel 3/8
Bricelj, 2016 Slovenia 3/8
  1. ANCS antenatal corticosteroids, = 1 point awarded, “- “= no points awarded. Assessed risk of bias of observational studies using a modified Newcastle Ottawa Scale