{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,28]],"date-time":"2026-02-28T18:55:54Z","timestamp":1772304954239,"version":"3.50.1"},"reference-count":31,"publisher":"American Medical Association (AMA)","issue":"6","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JAMA Netw Open"],"abstract":"Importance<\/jats:title>High-dose omega-3 docosahexaenoic acid (DHA) supplementation of children born at less than 29 weeks\u2019 gestation has been shown to improve IQ despite increasing the risk of bronchopulmonary dysplasia (BPD). Given that BPD is associated with poorer cognitive outcomes, it is unclear whether the increased risk of BPD with DHA supplementation is associated with decreased benefit to IQ.<\/jats:p><\/jats:sec>Objective<\/jats:title>To investigate whether the increased risk of BPD with DHA supplementation was associated with diminished IQ benefit.<\/jats:p><\/jats:sec>Design, Setting, and Participants<\/jats:title>This cohort study used data collected from a multicenter, blinded, randomized controlled trial of DHA supplementation in children born at less than 29 weeks\u2019 gestation. Participants were recruited from 2012 to 2015 and followed up until 5 years\u2019 corrected age. Data were analyzed from November 2022 to February 2023.<\/jats:p><\/jats:sec>Interventions<\/jats:title>Enteral DHA emulsion (60 mg\/kg\/d, to match the estimated in-utero requirement) or a control emulsion from the first 3 days of enteral feeds until 36 weeks\u2019 postmenstrual age or discharge home.<\/jats:p><\/jats:sec>Main Outcomes and Measures<\/jats:title>Physiological BPD was assessed at 36 weeks\u2019 postmenstrual age. IQ was assessed at 5 years\u2019 corrected age using the Wechsler Preschool and Primary Scale of Intelligence, 4th Edition<\/jats:italic>; children from the 5 highest-recruiting Australian hospitals were assessed. The total effect of DHA supplementation on IQ was divided into direct and indirect effects using mediation analysis, with BPD as the presumed mediating variable.<\/jats:p><\/jats:sec>Results<\/jats:title>Among 656 surviving children from hospitals involved in IQ follow-up (mean [SD] gestational age at birth, 26.8 [1.4] weeks; 346 males [52.7%]), there were 323 children with DHA supplementation and 333 children in the control group. Mean IQ was 3.45 points (95% CI, 0.38 to 6.53 points) higher in the DHA group than the control group, despite an increase in the risk of BPD (160 children [49.7%] vs 143 children [42.8%] with BPD). The indirect effect of DHA on IQ via BPD was not statistically significant (\u22120.17 points; 95% CI, \u22120.62 to 0.13 points), with most of the effect of DHA on IQ occurring independently of BPD (direct effect\u2009=\u20093.62 points; 95% CI, 0.55 to 6.81 points).<\/jats:p><\/jats:sec>Conclusions and Relevance<\/jats:title>This study found that associations of DHA with BPD and IQ were largely independent. This finding suggests that if clinicians supplement children born preterm with high-dose DHA, any resulting increase in BPD risk would not be associated with meaningful reductions in the IQ benefit.<\/jats:p><\/jats:sec>","DOI":"10.1001\/jamanetworkopen.2023.17870","type":"journal-article","created":{"date-parts":[[2023,6,9]],"date-time":"2023-06-09T15:32:22Z","timestamp":1686324742000},"page":"e2317870","source":"Crossref","is-referenced-by-count":12,"title":["Mediation Analysis to Untangle Opposing Associations of High-Dose Docosahexaenoic Acid With IQ and Bronchopulmonary Dysplasia in Children Born Preterm"],"prefix":"10.1001","volume":"6","author":[{"given":"Thomas R.","family":"Sullivan","sequence":"first","affiliation":[{"name":"SAHMRI Women and Kids, South Australian Health and Medical Research Institute, Adelaide, South Australia, Australia"},{"name":"School of Public Health, Faculty of Health and Medical Sciences, University of Adelaide, Adelaide, South Australia, 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G.","family":"Davis","sequence":"additional","affiliation":[{"name":"Clinical Sciences, Murdoch Children's Research Institute, Melbourne, Victoria, Australia"},{"name":"Newborn Research, Royal Women's Hospital, Parkville, Victoria, Australia"},{"name":"Obstetrics and Gynaecology, University of Melbourne, Parkville, Victoria, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Karen","family":"Simmer","sequence":"additional","affiliation":[{"name":"Newborn Medicine, Centre for Neonatal Research and Education, University of Western Australia, Perth, Western Australia, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Carmel T.","family":"Collins","sequence":"additional","affiliation":[{"name":"SAHMRI Women and Kids, South Australian Health and Medical Research Institute, Adelaide, South Australia, Australia"},{"name":"Discipline of Paediatrics, Faculty of Health and Medical Sciences, University of Adelaide, Adelaide, South Australia, 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