Fig. 4

Incidence proportions of adverse infant outcomes by study cohort and calendar year of pregnancy start

CI, confidence interval (depicted as error bars); AP infants, All Pregnancies infants; AP24+ infants, All Pregnancies with gestational age ≥24 weeks infants; LR infants, Low-Risk pregnancies infants

*Because the study start date was 1 January 2005, pregnancies reported as starting in 2004 include only those which began in the last 9 months of 2004 (if full term, for example)

°Pregnancies with a start date of 2017 were not included in this figure because the number was extremely low (and therefore incidence proportions less robust). Pregnancies reported as starting in 2017 included only those which began in the first month of 2017 (if full term, for example) because the study period end date was 31 December 2017 (with pregnancy end date up until 2 October 2017, as there was a requirement for at least a 90-day follow up after the pregnancy end date)