{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,23]],"date-time":"2026-08-23T13:22:38Z","timestamp":1787491358124,"version":"build-2736575974"},"reference-count":31,"publisher":"SAGE Publications","license":[{"start":{"date-parts":[[2026,8,1]],"date-time":"2026-08-01T00:00:00Z","timestamp":1785542400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"},{"start":{"date-parts":[[2026,8,1]],"date-time":"2026-08-01T00:00:00Z","timestamp":1785542400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"funder":[{"name":"Medical and Health Guidance Project of Xiamen City","award":["3502Z20244ZD1001"],"award-info":[{"award-number":["3502Z20244ZD1001"]}]}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Cancer Control"],"published-print":{"date-parts":[[2026,8]]},"abstract":"<jats:sec>\n                    <jats:title>Purpose<\/jats:title>\n                    <jats:p>To investigate the relationship between time to treatment initiation (TTI) of definitive radiotherapy and survival outcomes in locally advanced head and neck cancers (LAHNC).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>We retrospectively included patients diagnosed between 2005 and 2015 from the Surveillance, Epidemiology, and End Results (SEER) database. The multivariate regression analysis, recursive partition analysis, penalized spline function, chi-square test, Kaplan-Meier method, and multivariate Cox proportional-hazards models were used for statistical analyses.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>A total of 18657 patients were included. Patients were stratified into 3 groups: no delay (&lt;36 days), at risk of delay (36-61 days), and delay (&gt;61 days). Compared to patients who initiated radiotherapy within 61 days, patients who initiated radiotherapy after 61 days had a higher risk of death in 5-year cancer-specific survival (CSS) (no delay vs. at risk of delay vs. delay: 58.7% vs. 60.5% vs. 50.5%) (P&lt;0.001) and overall survival (OS) (no delay vs. at risk of delay vs. delay: 47.7% vs. 49.5% vs. 39.4%) (P&lt;0.001). Patients in the delay group had worse outcomes in CSS (hazard ratio [HR], 1.209; 95% confidence interval [CI], 1.143-1.278; P&lt;0.001) and OS (HR, 1.199; 95% CI, 1.146-1.256; P&lt;0.001). In patients with oral cavity, oropharyngeal, and laryngeal cancers, the risk of death progressively rose as the treatment was delayed. However, there was no significant difference in the risk among patients with hypopharyngeal cancer.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>For patients with LAHNC, delay of definitive radiotherapy leads to inferior survival. Our study highlights that the threshold of 36 and 61 days significantly affects survival and identifies patients experiencing these delays.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/10732748261481970","type":"journal-article","created":{"date-parts":[[2026,8,21]],"date-time":"2026-08-21T14:09:23Z","timestamp":1787321363000},"update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":0,"title":["Treatment Initiation of Definitive Radiotherapy in Patients With Locally Advanced Head and Neck Cancer"],"prefix":"10.1177","volume":"33","author":[{"given":"Lin-Feng","family":"Guo","sequence":"first","affiliation":[{"name":"The First Affiliated Hospital of Xiamen University"},{"name":"Xiamen University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Li-Mei","family":"Lin","sequence":"additional","affiliation":[{"name":"The First Affiliated Hospital of Xiamen University"},{"name":"Xiamen University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhen-Zhen","family":"Lu","sequence":"additional","affiliation":[{"name":"The First Affiliated Hospital of Xiamen University"},{"name":"Xiamen University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhi-Cong","family":"Hong","sequence":"additional","affiliation":[{"name":"The First Affiliated Hospital of Xiamen University"},{"name":"Xiamen University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0556-2614","authenticated-orcid":false,"given":"San-Gang","family":"Wu","sequence":"additional","affiliation":[{"name":"The First Affiliated Hospital of Xiamen University"},{"name":"Xiamen University"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2026,8,21]]},"reference":[{"key":"e_1_3_6_2_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.oraloncology.2018.03.001"},{"key":"e_1_3_6_3_2","doi-asserted-by":"publisher","DOI":"10.3322\/caac.21834"},{"key":"e_1_3_6_4_2","doi-asserted-by":"publisher","DOI":"10.1016\/S1470-2045(21)00076-0"},{"key":"e_1_3_6_5_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.ejso.2021.02.029"},{"key":"e_1_3_6_6_2","doi-asserted-by":"publisher","DOI":"10.1002\/cncr.29191"},{"key":"e_1_3_6_7_2","doi-asserted-by":"publisher","DOI":"10.1002\/cncr.31213"},{"key":"e_1_3_6_8_2","doi-asserted-by":"publisher","DOI":"10.1007\/s00405-016-4056-8"},{"key":"e_1_3_6_9_2","doi-asserted-by":"publisher","DOI":"10.1007\/s12325-018-0663-7"},{"key":"e_1_3_6_10_2","doi-asserted-by":"publisher","DOI":"10.1001\/jamaoto.2018.2716"},{"key":"e_1_3_6_11_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.oraloncology.2016.02.010"},{"key":"e_1_3_6_12_2","doi-asserted-by":"publisher","DOI":"10.1001\/archoto.2011.20"},{"key":"e_1_3_6_13_2","doi-asserted-by":"publisher","DOI":"10.1080\/0284186X.2022.2086441"},{"key":"e_1_3_6_14_2","unstructured":"Surveillance Epidemiology and End Results (SEER) Program. https:\/\/www.seer.cancer.gov. SEER*Stat Database: Incidence - SEER Research Data 17 Registries Nov 2024 Sub (2000-2022) National Cancer Institute DCCPS Surveillance Research Program released April 2025 based on the November 2024 submission."},{"key":"e_1_3_6_15_2","doi-asserted-by":"publisher","DOI":"10.7326\/0003-4819-147-8-200710160-00010"},{"key":"e_1_3_6_16_2","first-page":"89","article-title":"Flexible smoothing with $b$-splines and penalties","volume":"11","author":"Paul HCE","year":"1996","unstructured":"Paul HCE, Marx BD. Flexible smoothing with $b$-splines and penalties. 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