Patients in the T2DM group were older (mean age: 69.2 ± 8.1 vs. 64.8 ± 9.3 years, P < 0.001), had a higher prevalence of hypertension (63.2% vs. 34.7%, P < 0.001), and exhibited higher serum creatinine levels (77.8 ± 27.3 μmol/L vs. 65.0 ± 21.1 μmol/L, P = 0.001) and NT-proBNP levels (median: 465 pg/mL vs. 210 pg/mL, P < 0.001). Here, NPPB is linked to type 2 diabetes mellitus.