Impact of circulating neutrophil count on mortality: Kaplan-Meier survival curves. Groups were compared by the log-rank test (Mantel- Haenzel). Bottom: multivariate Cox regression analysis for mortality risk. Circulating neutrophil count (CNC) was adjusted by age, sex and Acute Physiology and Chronic Health Evaluation II score. Time was censored at 28 days following diagnosis. CI, confidence interval; Cum, cumulative; HR, hazard ratio.