Statistical analyses
Descriptive statistics were reported as frequencies and percentages or
as median (interquartile range). Statistical analyses were conducted to
compare children with and without corticosteroids: continuous variables
were compared using Student t test if normally distributed (as
attested by the Shapiro-Wilk test) or Wilcoxon test if not, and the
chi-square statistic was used for categorical variables. Results were
considered statistically significant when the p value was less
than 0.05.