Statistical analysis
SD
REGRESSION, SECONDARY
Depending on the distribution of the data, continuous variables were expressed as mean value ± SD or median and interquartile range (IQR). Frequencies and percentages were used to describe categorical data. Differences between continuous and categorical variables were assessed using Student’s T-test, analysis of variance, Chi-square test, and repeated measures ANOVA as appropriate. Multivariable logistics regression analysis was conducted to analyze the independent risk factors for CA-AKI. Multivariable Cox regression analysis was conducted to analyze the independent risk factors for MACEs in STEMI patients after pPCI. The cumulative incidence of MACEs was estimated by Kaplan–Meier survival curves, and the groups were compared using the log-rank test. Hydration difference on secondary endpoint was assessed with analyses of P for interaction. All analyses were two-tailed and 