{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,27]],"date-time":"2026-10-27T12:56:25Z","timestamp":1793105785635,"version":"4.5.0"},"reference-count":30,"publisher":"Wiley","issue":"5","license":[{"start":{"date-parts":[[2015,3,23]],"date-time":"2015-03-23T00:00:00Z","timestamp":1427068800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"name":"Nils W Svenningsens Stiftelse f\u00f6r Prematurforskning"},{"DOI":"10.13039\/501100004359","name":"Swedish Research Council","doi-asserted-by":"crossref","award":["2006-3855; 2009-4250"],"award-info":[{"award-number":["2006-3855; 2009-4250"]}],"id":[{"id":"10.13039\/501100004359","id-type":"DOI","asserted-by":"crossref"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Acta Paediatrica"],"published-print":{"date-parts":[[2015,5]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Aim<\/jats:title>\n                    <jats:p>The early identification of at\u2010risk extremely preterm (EPT) children could improve long\u2010term outcomes. This study sought to investigate sex differences in developmental outcomes and to identify sex\u2010specific predictors at two and a half years of age.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>We assessed 217 boys and 181 girls born before 27\u2010week gestation using the Bayley Scales of Infant and Toddler Development, third edition (Bayley\u2010III), as a part of the Extremely Preterm Infants in Sweden Study. Sex\u2010specific differences were calculated. Socio\u2010economic, birth and neonatal factors were calculated separately for boys and girls using regression models.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>Girls scored significantly higher than boys on all Bayley\u2010III indices. In both sexes, brain injury, long\u2010term ventilator treatment and foreign\u2010born mothers predicted lower scores. Receiving breast milk by hospital discharge predicted higher scores. Severe retinopathy of prematurity was the strongest predictor of cognitive and language deficits in boys. High parental education predicted higher cognitive and language scores in girls, whereas severe bronchopulmonary dysplasia was the strongest predictor of motor deficits.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>Extreme prematurity seems to affect boys more than girls. Socio\u2010economic and neonatal factors confer similar risks or protections on both sexes, but some variables pose sex\u2010specific risks. An awareness of risk factors may provide the basis for treatment and follow\u2010up guidelines.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1111\/apa.12937","type":"journal-article","created":{"date-parts":[[2015,1,25]],"date-time":"2015-01-25T05:53:52Z","timestamp":1422165232000},"page":"514-521","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":58,"title":["Extremely preterm birth affects boys more and socio\u2010economic and neonatal variables pose sex\u2010specific risks"],"prefix":"10.1111","volume":"104","author":[{"given":"Johanna","family":"M\u00e5nsson","sequence":"first","affiliation":[{"name":"Department of Psychology Lund University Lund Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Vineta","family":"Fellman","sequence":"additional","affiliation":[{"name":"Department of Pediatrics Lund University Lund Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Karin","family":"Stjernqvist","sequence":"additional","affiliation":[{"name":"Department of Psychology Lund University Lund Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"name":"the EXPRESS Study Group 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