Respiratory distress syndrome in infants of Cardiff residents during 1965-75.

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Abstract
The incidence of respiratory distress syndrome (RDS) among singleton infants of Cardiff residents was greater during 1970-4 than in the preceding five years. This was consistent with changes in the distribution of gestational age and birth weight. Case fatality rates among infants with RDS fell only slightly during the period examined. Detailed examination of secular trends during 1965-75 suggested (a) that increased use of elective delivery without assessment of pulmonary maturity increases the risk of RDS, and (b) that innovations in the management of RDS during the early 1970s cannot be assumed to have had widespread impact on case fatality rates.