Figure 2From: The epidemiology of severe sepsis in England, Wales and Northern Ireland, 1996 to 2004: secondary analysis of a high quality clinical database, the ICNARC Case Mix Programme DatabaseChanges in case mix for admissions with severe sepsis during the first 24 hours following admission to critical care, 1996 to 2004. *Surgical status: L, elective; M, emergency; N, non-surgical. CI, confidence interval; HDU, high dependency unit; ICU, intensive care unit.Back to article page