Fig. 2

a Proportion of smokers among individuals with type 1 diabetes (T1D) in the DPV registry vs. results from the DEBRA study (general population) from 2016 to 2023. DPV: Diabetes Prospective Follow-up Registry (Diabetes Patienten Verlaufsdokumentation). b Proportion of smokers among individuals with type 2 diabetes (T2D) in the DPV registry vs. results from the DEBRA study (general population) from 2016 to 2023. DPV: Diabetes Prospective Follow-up Registry (Diabetes Patienten Verlaufsdokumentation)