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Patient demographics and clinical characteristics
Patients Diagnosed with OsteoradionecrosisPatients Diagnosed with Tumor RecurrenceP Value
No. of patients4617NA
Average age (yr)6269.11
Age range (yr)33–9353–85
% Men (No.)76.1 (35)77.5 (13)1.00
Primary malignancy siteOral Cavity (n = 27), oropharynx (n = 11), parotid (n = 5), NPC (n = 2) unknown (n = 1)Oral cavity (n = 15), oropharynx (n = 1), sinonasal (n = 1)
Primary malignancy histologySquamous cell (n = 44), adenoid cystic (n = 2)Squamous cell (n = 17)
Mean interval (range) between last RT and detection of abnormality (mo)40.56 (6–110)48.82 (5–98).19
  • Note:—NA indicates not applicable; NPC, nasopharyngeal cancer; RT, radiation therapy.