Figure 3: 30-day mortality in relation to both baseline white blood cell (WBC) count and C-reactive protEin (CRP) level, categorized as low WBC count (= Quartile 1) plus low CRP level (=15 mg/l), high WBC count (> Quartile 1) plus low CRP level, and any WBC count plus high CRP level (>15 mg/l). The quartile 1 of WBC is equal to 3.4 to 6.5 x109/l.