Compared with those without CVD readmission, the patients with CVD readmission were older (56.3 ± 15.7 vs 46.2 ± 15.0 years, p < 0.001), more likely to have a history of DM (42.5% vs 24.4%, p < 0.001), CVD (44.2% vs 19.3%, p < 0.001), and hypertension (35.0% vs 18.0%, p < 0.001), and had a higher BMI (22.5 ± 4.0 vs 21.6 ± 3.5, p = 0.01), but lower levels of hemoglobin (97.9 ± 17.3 vs 101.4 ± 21.5 g/L, p = 0.04), albumin (34.1 ± 6.0 vs 37.1 ± 5.4 g/L, p < 0.001), iPTH [186 (74–358) vs 252 (120–436) pg/ml, p = 0.003], and HDLC(1.08 ± 0.38 vs 1.22 ± 0.44 mmol/L, p = 0.001). Here, ALB is linked to diabetes mellitus.