Fig. 3From: Neonatal respiratory morbidity following exposure to chorioamnionitisIncidence of respiratory distress syndrome (Panels a & b) and composite respiratory distress syndrome and perinatal mortality (Panels c & d) using the traditional (Panels a & c) and fetuses-at-risk (Panels b & d)approach. Washington State Preterm Births 2002–2011 n = 56,537Back to article page