2.5 Statistical analysis
The sensitivity and specificity of mNGS for the diagnosis of pulmonary infection was calculated with the final diagnosis as the gold standard. SPSS Statistics 25.0 statistical software was used for statistical analysis, and GraphPad Prism 8 was used to create statistical charts. The chi-square test was used to compare the rates between groups. Variance analysis was used to compare measurement data sets between groups. P < 0.05 was considered statistically significant.