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Selected patients from 2009 to 2018 had locally advanced HNC, underwent upfront surgery, and were eligible for adjuvant RT. Multivariable logistic regression and chi\u2010squared test were used to analyze available patient and tumor characteristics.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Of 12\u2009549 patients, 84.5% underwent adjuvant RT, 15.5% did not. Characteristics associated with lowest adjuvant RT utilization included cancers of the larynx (<jats:italic>p<\/jats:italic>\u00a0&lt;\u20090.0001) and gingivae (<jats:italic>p<\/jats:italic>\u00a0&lt;\u20090.0001), age 80 and above (<jats:italic>p<\/jats:italic>\u00a0&lt;\u20090.0001), unpartnered status (<jats:italic>p<\/jats:italic>\u00a0&lt;\u20090.0001), and residence within a nonmetropolitan area (<jats:italic>p<\/jats:italic>\u00a0&lt;\u20090.0024).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Tumor subsite, age, partnered status, and rural\/urban residence correlate with omission of adjuvant RT in locally advanced HNC.<\/jats:p><\/jats:sec>","DOI":"10.1002\/hed.27319","type":"journal-article","created":{"date-parts":[[2023,2,17]],"date-time":"2023-02-17T04:44:47Z","timestamp":1676609087000},"page":"921-930","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Equity in adjuvant 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