Participants
Preterm-born children and young adults, with and without a diagnosis of BPD, and healthy term-born controls, were assessed between the ages of 6 and 23 years (data are collated from two distinct cohorts ages 6-1216 and 16-23 25). Elements of this lung function data have been presented in these publications. Preterm-born participants were delivered at 32 weeks gestation or less, hospitalised at King Edward Memorial Hospital (KEMH) in Perth, Western Australia. Participants born preterm were classified as having bronchopulmonary dysplasia if they received 28 days of oxygen supplementation or more, as assessed at 36 weeks postmenstrual age.26 Healthy term participants were born at 37 weeks gestation or more and had no history of recurrent respiratory symptoms or lung disease at the time of recruitment. Written informed consent was obtained from participants over 18 years of age and from parents or guardians for participants under 18 years. Ethical approval was obtained from the Child and Adolescent Health Service Human Research Ethics Committee (RGS367, RGS815).