In patients with HF, serum IL-34 levels were not significantly different between patients with and without hypertension (117.64 ± 7.86 pg/mL vs. 113.59 ± 11.03 pg/mL, p = 0.764), as well as those with and without diabetes mellitus (106.15 ± 8.90 pg/mL vs. 122.04 ± 8.67 pg/mL, p = 0.202), indicating that there was no relationship between IL-34 and the presence of hypertension or diabetes mellitus. Here, IL34 is linked to diabetes mellitus.