Fig. 3

a Number of cigarettes/day among smokers with type 1 diabetes (T1D) from 2016 to 2023. DPV: Diabetes Prospective Follow-up Registry (Diabetes Patienten Verlaufsdokumentation). b Number of cigarettes/day among smokers with type 2 diabetes (T2D) from 2016 to 2023. DPV: Diabetes Prospective Follow-up Registry (Diabetes Patienten Verlaufsdokumentation)