{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,3]],"date-time":"2026-05-03T08:48:45Z","timestamp":1777798125581,"version":"3.51.4"},"reference-count":40,"publisher":"Wiley","issue":"15","license":[{"start":{"date-parts":[[2020,5,15]],"date-time":"2020-05-15T00:00:00Z","timestamp":1589500800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/100009619","name":"Japan Agency for Medical Research and Development","doi-asserted-by":"publisher","award":["19fm0208013h0003"],"award-info":[{"award-number":["19fm0208013h0003"]}],"id":[{"id":"10.13039\/100009619","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["acsjournals.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Cancer"],"published-print":{"date-parts":[[2020,8]]},"abstract":"<jats:sec><jats:title>Background<\/jats:title><jats:p>The role and impact of radiation therapy (RT) on the development of herpes zoster (HZ) has not been well studied. The objective of this study was to investigate the association between RT and HZ.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>A propensity score\u2010matched, retrospective cohort study was conducted using institutional cancer registry data and medical records from 2011 to 2015. The risk of developing HZ in the RT and non\u2010RT groups was compared using a Cox proportional hazards model. Associations also were explored between the RT field and the anatomic location of HZ in patients who developed HZ after RT. The expected number of HZ events within the radiation field was calculated according to the RT received by each patient; then, this number was compared with the observed number of in\u2010field events.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Of 17,655 patients, propensity score matching yielded 4350 pairs; of these, 3891 pairs were eligible for comparison. The cumulative incidence of HZ in the RT group (vs the non\u2010RT group) during the first 5\u00a0years after the index date was 2.1% (vs 0.7%) at 1\u00a0year, 3.0% (vs 1.0%) at 2\u00a0years, 3.4% (vs 1.3%) at 3\u00a0years, 4.1% vs 1.7% at 4\u00a0years, and 4.4% vs 1.8% at 5\u00a0years. The RT group showed a significantly higher risk of HZ than the non\u2010RT group (hazard ratio, 2.59, 95% CI, 1.84\u20103.66). In the 120 patients who developed HZ after RT, HZ events were observed significantly more frequently within the RT field than expected (74 vs 43.8 events; <jats:italic>P<\/jats:italic>\u00a0&lt;\u00a0.001).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Patients with cancer who received RT showed a significantly higher risk of HZ, which was commonly observed within the radiation field.<\/jats:p><\/jats:sec>","DOI":"10.1002\/cncr.32926","type":"journal-article","created":{"date-parts":[[2020,5,16]],"date-time":"2020-05-16T01:34:44Z","timestamp":1589592884000},"page":"3552-3559","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["Radiation therapy and the risk of herpes zoster in patients with cancer"],"prefix":"10.1002","volume":"126","author":[{"given":"Takuya","family":"Shimizuguchi","sequence":"first","affiliation":[{"name":"Department of Radiation Oncology Tokyo Metropolitan Cancer and 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