Pima Indians Diabetes data set 1: Description. From National Institute of Diabetes and Digestive and Kidney Diseases. Several constraints were placed on the selection of these instances from a larger database. In particular, all patients here are females at least 21 years old of Pima Indian heritage. 2: Type. Classification 3: Origin. Real world 4: Instances. 768 5: Features. 8 6: Classes. 2 7: Missing values. No 8: Header. @relation pima @attribute Preg real [0.0, 17.0] @attribute Plas real [0.0, 199.0] @attribute Pres real [0.0, 122.0] @attribute Skin real [0.0, 99.0] @attribute Insu real [0.0, 846.0] @attribute Mass real [0.0, 67.1] @attribute Pedi real [0.078, 2.42] @attribute Age real [21.0, 81.0] @attribute Class {tested_negative, tested_positive} @inputs Preg, Plas, Pres, Skin, Insu, Mass, Pedi, Age @outputs Class