Statistical Analysis
All statistical tests were performed using SPSS version 23.0.
Categorical variables are expressed as frequency with percentage, while
continuous variables are expressed as mean and median with
interquartile range (IQR). The
chi‐square or Fisher’s exact test was used to compare the categorical
variables. The Wilcoxon rank sum test was used to compare the continuous
variables between different groups. Logistic regression analysis was
performed to identify the independent risk factors of PR severity and
re-stenosis while adjusting for potential confounding variables.
The odds ratios (ORs) and 95%
confidence intervals (CI) were obtained. Freedom from repeat PBPV or
surgical intervention was evaluated using the Kaplan–Meier curve.
Statistical significance was defined as a P value of <0.05.