The information from the NDR was then linked with data from the Swedish Prescribed Drug Register (SPDR) [27], which contains individualised data on prescribed drugs, to identify subgroups of people with type 2 diabetes treated with multiple daily insulin injections (T2D-MDI) or on basal insulin (T2D-B), with or without non-insulin glucose-lowering drugs. This evidence concerns the gene INS and type 2 diabetes mellitus.