Data Analysis
Continuous variables are described as median and interquartile ranges (IQR). Categorical variables are presented as numbers with percentages. The chi-square test or Fisher’s exact test was used to compare categorical variables among groups. Total sedation failure rate, sedation failure rates in different age groups (≤0.5 years, 0.5-3 years, 3-12 years, ≥12 years) and incidence of adverse events were calculated. Grouped by administration method and failure performance in sedation failure patient, then calculated the proportion of patients in different age groups. All statistical analyses were performed using R (version 4.2.0. R Core Team,2022). All P values were 2-sided, and P = 0.05 was used to indicate statistical significance.