Figure 1.

Flow chart of the study population, Northern Finland, 2009–2011. All subjects who were recruited into the study were born in Northern Finland in 1986–1989. In the Finnish Medical Birth Register data, there were 83 individuals in the random control group who had missing gestational age, 58 of whom did not participate in the Preterm Birth and Early Life Programming of Adult Health and Disease (ESTER) Study and 25 of whom participated. Ten subjects who were born early preterm, 1 subject who was born late preterm, and 4 controls reported severe disability and were excluded from the analysis. Five subjects who were born early preterm, 5 subjects who were born late preterm, and 8 controls reported being pregnant and were excluded from the analysis. Three of the excluded subjects had more than 1 reason for exclusion.