2.8. Statistical analysis
REGRESSION
Data are presented as the median (interquartile range) or number (%). Categorical variables were analyzed using Fisher’s exact test or the chi-squared test. The normality of continuous variables was evaluated using the Shapiro–Wilk test. Independent variable t-tests or Wilcoxon rank-sum tests were used to analyze continuous variables. Univariate logistic regression analysis was used to explore the factors causing the HR to be < 50 bpm; variables with a 