Subtype refers to a Group of people with a specific disorder who have something in common, such as symptoms, etiology, problem severity, or likely outcome, that makes them distinct f
rom people with other subtypes of the same disorder.
Other /More definition:
subtype refers to a group of people with a specific disorder who have something in common, such as symptoms, etiology, problem severity, or likely outcome, that makes them distinct from people with other subtypes of the same disorder.