Characteristics of the studies which evaluated the incidence of type 2 diabetes using baseline HbA_1c levels.

* Median age † This study advocated that it was a prospective cohort, but it was a part of a randomized clinical trial. ‡ Race was not listed, but almost 100% of participants might be Japanese. § Mean age was not listed, but 15–39yr., 40–59yr., and ≥59yr. were 24, 32, 44%, respectively. FPG: fasting plasma glucose; CPG: casual plasma glucose Characteristics of the studies which evaluated the incidence of type 2 diabetes using baseline HbA1c levels.