IDH3A and diabetes mellitus: Prior studies suggested that height as a glioma risk factor was stronger in glioblastoma cases, while this association was not significant in restricting isocitrate dehydrogenase (IDH) mutant gliomas.11,15 Further studies are needed to analyze the incidence and risk factors according to histologic and molecular subgroups.” Second, although previous studies showed diabetes might be unrelated to glioma, our study results did not agree.30 To reduce bias, our adjusted model included the presence of diabetes.