Multivariate analysis of predictors for the occurrence of post-radiotherapy Grade 3 mastoiditis.

OR, odds ratio; CI, confidences interval; G0M, grade 0 mastoiditis; G1-2M, grade 1–2 mastoiditis; G3M, grade 3 mastoiditis.†OR and 95%CI were calculated using a GLMM (generalized linear mixed model).‡ Treatment, T category and time were significant risk factors of post-radiotherapy G3M in the G0M group. Age and time were found to be independent predictors for post-radiotherapy G3M in the G3M group.Note: Due to the limited number of patients, as well as highly unbalanced classification of treatment and pathology in the G1-2M group, we couldn't get any result in multivariate analysis by GLMM.Multivariate analysis of predictors for the occurrence of post-radiotherapy Grade 3 mastoiditis.