Demmer rt, et al. Prevalence of diagnosed and undiagnosed type 2 diabetes mellitus among Us adolescents, results from the continuous nHANES, 1999-2010 AmJ Epidemiol 2013 178(7):1106-1113 Estimates of the prevalences of type 1 and type 2 diabetes were 0.48% and 0.369, respectively, indicating that T2DM accounted for 43% of all cases Further, undiagnosed T2DM prevalence was.12%, representing 34% of T2DM cases. T2DM accounts for approximately half of adolescent dia betes in the us. and one-third of these cases are undiagnosedDemmer RT, et al. Prevalence of diagnosed and undiagnosed type 2 diabetes mellitus among US adolescents: results from the continuous NHANES, 1999-2010. Am J Epidemiol 2013; 178(7): 1106-1113 • Estimates of the prevalences of type 1 and type 2 diabetes were 0.48% and 0.36%, respectively, indicating that T2DM accounted for 43% of all cases. Further, undiagnosed T2DM prevalence was 0.12%, representing 34% of T2DM cases. T2DM accounts for approximately half of adolescent diabetes in the US, and one-third of these cases are undiagnosed