IDH1 and neoplasm: Considering the collinearity of SUVSD and TBRs (variance inflation factor threshold <5), SUVSD and dichotomized tumor location status were selected to build the simple generalized linear model with reasonable IDH genotype predictive performance [AUC (95%CI) = 0.786 (0.659-0.883), sensitivity = 85.0%, specificity = 71.1%, accuracy = 75.9%].