Distribution of the four most predictive variables in the expanded cohort of 293 patients.

(A) C-reactive protein (CRP). (B) Absolute neutrophil count (ANC). (C) X-ray signs Consolidation. (D) Age group. In (A) and (B), the mean and standard error of mean are shown. In (C) and (D), the number of patients per category is shown. The patients with mixed infection are indicated separately although they were calculated as possessing ‘bacterial infection’ class labels in this study. (ZIP)