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The majority of the definitions of BPD still use the respiratory support provided to the infants at a single timepoint. The lack of a uniform definition of BPD presently reflects the changing BPD pathogenesis and phenotype and limits defining the epidemiology. To address the epidemiology of BPD, the definition should be clarified; even the newer definitions have not been validated entirely. The definition needs to be meaningful clinically and be predictive of long\u2010term respiratory outcomes. We believe the definition should have a composite assessment like a score (quantitative measurement) and include the different phenotypes (qualitative measurements) so that optimally they can be applied to the different phases of BPD and at different timepoints. Furthermore, the definitions need to be easy to measure and assess so that generalizability is enhanced.<\/jats:p>","DOI":"10.1002\/ppul.25434","type":"journal-article","created":{"date-parts":[[2021,4,29]],"date-time":"2021-04-29T10:32:43Z","timestamp":1619692363000},"page":"3527-3532","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":17,"title":["The challenge of accurately describing the epidemiology of bronchopulmonary dysplasia (BPD) based on the various current definitions of BPD"],"prefix":"10.1002","volume":"56","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3835-5806","authenticated-orcid":false,"given":"Milenka","family":"Cuevas Guaman","sequence":"first","affiliation":[{"name":"Department of Pediatrics, Division of Neonatology, Baylor College of Medicine Texas Children's Hospital  Houston Texas USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Paul H.","family":"Dahm","sequence":"additional","affiliation":[{"name":"Department of Pediatrics, Division of Critical Care Medicine McGovern Medical School at UTHealth  Houston Texas USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6321-8440","authenticated-orcid":false,"given":"Stephen E.","family":"Welty","sequence":"additional","affiliation":[{"name":"Department of Pediatrics, Section of Neonatology, University of Washington School of Medicine Seattle Children's Hospital  Seattle Washington USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2021,4,30]]},"reference":[{"key":"e_1_2_6_2_1","doi-asserted-by":"publisher","DOI":"10.1542\/peds.2005-0249"},{"key":"e_1_2_6_3_1","doi-asserted-by":"publisher","DOI":"10.1542\/pir.33-6-255"},{"issue":"6","key":"e_1_2_6_4_1","first-page":"581","article-title":"Clinical and roentgenographic scoring systems for assessing bronchopulmonary dysplasia","volume":"138","author":"Toce SS","year":"1984","journal-title":"Am J Dis Child (1960)"},{"key":"e_1_2_6_5_1","doi-asserted-by":"publisher","DOI":"10.1164\/ajrccm.163.7.2011060"},{"key":"e_1_2_6_6_1","doi-asserted-by":"publisher","DOI":"10.1542\/peds.2008-1962"},{"key":"e_1_2_6_7_1","doi-asserted-by":"publisher","DOI":"10.3389\/fped.2018.00397"},{"key":"e_1_2_6_8_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.earlhumdev.2011.12.013"},{"key":"e_1_2_6_9_1","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pone.0235901"},{"key":"e_1_2_6_10_1","doi-asserted-by":"publisher","DOI":"10.1038\/jp.2014.126"},{"key":"e_1_2_6_11_1","doi-asserted-by":"publisher","DOI":"10.1542\/peds.2010-0648"},{"key":"e_1_2_6_12_1","doi-asserted-by":"publisher","DOI":"10.1164\/rccm.201101-0055OC"},{"key":"e_1_2_6_13_1","doi-asserted-by":"publisher","DOI":"10.1542\/peds.2012-0336"},{"key":"e_1_2_6_14_1","doi-asserted-by":"publisher","DOI":"10.1542\/peds.2011-3028"},{"key":"e_1_2_6_15_1","doi-asserted-by":"publisher","DOI":"10.1542\/peds.2009-2959"},{"key":"e_1_2_6_16_1","doi-asserted-by":"publisher","DOI":"10.1164\/rccm.201812-2348OC"},{"key":"e_1_2_6_17_1","doi-asserted-by":"publisher","DOI":"10.1097\/MOP.0000000000000884"},{"key":"e_1_2_6_18_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41390-018-0167-9"},{"key":"e_1_2_6_19_1","doi-asserted-by":"publisher","DOI":"10.1001\/jamapediatrics.2016.4141"},{"key":"e_1_2_6_20_1","doi-asserted-by":"publisher","DOI":"10.1513\/AnnalsATS.201504-218OC"},{"key":"e_1_2_6_21_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jpeds.2018.01.043"},{"key":"e_1_2_6_22_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jpeds.2016.10.082"},{"key":"e_1_2_6_23_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41390-018-0152-3"},{"key":"e_1_2_6_24_1","unstructured":"VON N. 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