Randomization
CVD
Finally, 171 patients with a definite diagnosis of CVD were included in this study and assigned to the treatment group and the control group using a completely randomized method. Patients meeting the inclusion criteria were numbered sequentially based on the order of enrollment; random numbers were copied from the first row of the random number table and were sorted from lowest to highest. Patients corresponding to even random numbers were placed in the treatment group, and patients corresponding to odd random numbers were placed in the control group. There was no blinding used in the grouping.