Table 2. Decisions made in formulating initial diagnosis dataset and impact on sample size.

No.	Diagnosis	Decision: Include/Exclude	Cumulative size
1	Specific T2DM1	Include	171,504
2	T2DM1 with Complications, medications	Include	173,958
3	Specific DM2	Include, if first prescription was not insulin	244,492
4	DM2 with Complications, medications	Include, if first prescription was not insulin	251,291
5	Complication but no confirmed diagnosis mentioned, onset date likely to be earlier than this	Exclude	251,291
6	Diagnosis and onset date not confirmed, but likely to be DM2	Exclude	251,291
7	Diet	Include, if first prescription was not insulin	252,558
8	Other	Exclude	252,558

^1: Type 2 diabetes mellitus

^2: Diabetes mellitus