RT Journal Article SR Electronic T1 Radiation-induced Oral Mucositis in Brazilian Patients: Prevalence and Associated Factors JF In Vivo JO In Vivo FD International Institute of Anticancer Research SP 605 OP 609 DO 10.21873/invivo.11517 VO 33 IS 2 A1 PEREIRA, IGOR FIGUEIREDO A1 FIRMINO, RAMON TARGINO A1 MEIRA, HENRIQUE CORTES A1 DO EGITO VASCONCELOS, BELMIRO CAVALCANTI A1 DE SOUZA NORONHA, VLADIMIR REIMAR AUGUSTO A1 SANTOS, VAGNER RODRIGUES YR 2019 UL http://iv.iiarjournals.org/content/33/2/605.abstract AB Aim: To determine the prevalence of radiation-induced oral mucositis (OM) and associated factors. Patients and Methods: A cross-sectional retrospective study was performed at a reference dental care center. The medical records of patients submitted to radiotherapy for the treatment of head and neck cancer were used to collect clinical and demographic variables. The data were submitted to descriptive analysis and multivariate Poisson regression with robust variance [p<0.05; 95% confidence intervaI (CI)]. Results: Four hundred and thirteen patients were analyzed. The mean age was 55±14 years. The prevalence of OM in the overall sample was 41.9% and was higher among males (78.2%). The following variables were significantly associated with the outcome: radiation dose [prevalence ratio (PR)= 1.04; 95% CI=1.02-1.06]; concomitant chemotherapy (PR=1.48, 95% CI=1.05-2.08); oral candidiasis (PR=1.97, 95% CI=1.44-2.68); and osteoradionecrosis (PR=1.51, 95% CI=1.10-2.06). Conclusion: Radiation-induced OM was associated with radiation dose, concomitant chemotherapy, oral candidiasis and osteoradionecrosis. The rate of OM underscores the importance of adequate oral care prior to treatment for head and neck cancer.