2.3 Statistical Analysis
Clinical characteristics of the study participants prior to the COVID-19 pandemic were compared with those during the COVID-19 pandemic. All data were entered into the statistical package SPSS version 25.0 (SPSS Inc., Chicago, IL, USA). Continuous variables were expressed as median (interquartile range, IQR), and compared with Mann-Whitney U test. Categorical variables were presented as number (%) and analyzed using Chi-square test or Fisher’s exact test. Binary logistic regression analysis was used to examine the related factors of severe pneumonia in children. Two-sided P values ≤ 0.05 were considered statistically significant.
Results