Fig. 1.

Diabetes subtypes. Diabetes has historically been classified as type 1, type 2, gestational or secondary to other causes (monogenic disease, pancreatic disease, drug-induced, etc.). Increasingly, there is recognition that overlap exists between these categories. Subtypes representing an overlap between type 1 and type 2 diabetes include LADA and ketosis-prone diabetes (KPD). Various strategies have been proposed to further divide type 1 and type 2 diabetes into subtypes, including the example publications listed. This figure is available as part of a downloadable slideset