Statistics
Data analyses were performed using SPSS version 21.0 (SPSS Inc. Chicago, IL, USA). Quantitative data are presented as the medians with the 25th and 75th percentiles in square brackets, while qualitative data are expressed as the number or percentage as appropriate. A chi-squared test and unpaired Student’s t-test or Mann–Whitney U test were used to compare the demographic characteristics, clinical manifestations, and laboratory data. Significant indicators from univariate analysis were then subjected to multivariate logistic regression analysis to identify independent predictors of IVIG resistance. Receiver operating characteristic (ROC) curve analysis was used to evaluate the value of coagulative biomarkers for predicting the development of initial and repeated IVIG resistance. A P-value <0.05 was considered statistically significant.