Fig. 2

Clustering of changes of TyG from Wave 1 to Wave 3. Changes in TyG classified into four classes using the K-means algorithm (A, B ); Mean TyG for the four classes in 2012 and 2015 (C); Class 1 (Red)—Stable Low-Risk Group; Class 2 (Green)—Rapidly Increasing Group, Class 3 (Cyan)- Significant Improvement Group; Class 4 (Purple)—Persistent High-Risk Group