Statistical Analyses
Statistical tests were performed using R software (2020, version 4.0.0, R Core Team, Vienna, Austria). Demographic, clinical characteristic, and management data were presented with descriptive statistics. A chi-squared test was used to compare proportions. Continuous variables were assessed by an independent two-samples T-test. Logistic regression was used to assess factors associated with coldA and well-controlled symptoms on sgAHs (UCT≥12). Multivariate cox regression analysis was used to compare the resolution rate of coldU to CSU, using thesurvival and surviminer packages. A Kaplan-Meier curve of disease persistence was plotted using the ggplot2 package.