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In the current study, the authors investigated associations between demographic characteristics and factors associated with CCT eligibility and enrollment using real\u2010world data.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>A cross\u2010sectional analysis was conducted among 113,030 adult patients with cancer who were treated at Moffitt Cancer Center between 2011 and 2021. Eligibility criteria from 100 CCTs were manually abstracted and conceptually mapped to variables in the Moffitt Cancer Analytics Platform. Other factors potentially affecting patient eligibility or enrollment in CCTs were identified following the Socioecological Model and were compared across patient groups by age, sex, race, and ethnicity.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The most frequent eligibility criteria in the abstracted CCTs included laboratory results associated with liver function (89%) and bone marrow function (88%). Thirty\u2010nine percent of the protocols required genetic testing. Black\/African American patients experienced a higher prevalence of diabetes (\u0394\u00a0=\u00a03.2%), human immunodeficiency virus infection (\u0394\u00a0=\u00a01.4%), and abnormal laboratory results compared with White patients. Hispanic patients experienced a higher prevalence of human immunodeficiency virus infection (\u0394\u00a0=\u00a00.2%) and a history of organ transplantation (\u0394\u00a0=\u00a00.2%) compared with non\u2010Hispanic patients. Compared with younger patients, older adults had a higher prevalence of nononcologic conditions. Female, Black, and\/or Hispanic patients were more likely to experience barriers to care, including childcare and transportation, and to live in more socially deprived areas compared with male, White, or non\u2010Hispanic patients.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Restrictive CCT eligibility criteria and social determinants of health may pose structural barriers that disproportionately affect patient diversity. Investigators should leverage real\u2010world data to design appropriate trial eligibility criteria.<\/jats:p><\/jats:sec>","DOI":"10.1002\/cncr.35944","type":"journal-article","created":{"date-parts":[[2025,6,18]],"date-time":"2025-06-18T07:24:34Z","timestamp":1750231474000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["An examination of factors associated with disparities in clinical trial eligibility guided by the Socioecological Model"],"prefix":"10.1002","volume":"131","author":[{"given":"Yayi","family":"Zhao","sequence":"first","affiliation":[{"name":"Cancer Epidemiology Program H. Lee Moffitt Cancer Center &amp; Research Institute  Tampa Florida USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rossybelle P.","family":"Amorrortu","sequence":"additional","affiliation":[{"name":"Cancer Epidemiology Program H. 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