Statistical methods
COMPLICATIONS

Data from this study were statistically analyzed using SPSS version 23.0 (IBM SPSS Inc., Chicago, IL, USA). The Shapiro–Wilk test was used to test the normal distribution of the functional questionnaire scores of all patients, and exploratory analysis was used to calculate subject demographics. An independent sample t-test was used to evaluate the function between the two groups; the chi-square test was used to compare the difference in complications between the two groups within 6 months; We set α as 0.05, efficacy 1-β as 0.8, OR = 4, and obtained a sample size of at least 30 people in each group (n = 30). All statistical methods were tested at a level of alpha of 0.05. Count data were expressed as cases and percentages; measurement data were expressed as mean ± standard deviation.