NPPB and type 1 diabetes mellitus: N-terminal pro–B-type natriuretic peptide (proBNP) was elevated above the upper limit (125 ng/L < 71 year old; 450 ng/L for ≥ 71 year old) in 35% of T1D and 22% of T2D, and levels of high-sensitivity cardiac troponin T (hsTNT) were elevated above the upper limit (> 14 ng/L) in 14% of T1D and 27% of T2D (Table 4, Panel b), as markers indicating cardiac dysfunction and damage of heart muscle, respectively.