ADAMTS13 and diabetes mellitus: By using the method of “forward stepwise selection”, the Cox proportional hazards model showed that only ADAMTS13 activity (Hazard ratio 0.94, 95% CI 0.90–0.98, p = 0.003), the comorbid diseases: DM (Hazard ratio 5.60, 95% CI 1.15–27.53, p = 0.03) and CHD (Hazard ratio: 4.27, 95% CI 1.29–14.09, p = 0.02) have significant correlations with the occurrence of endpoints (Table 2).