Preoperative Drug Dispensing as Predictor of Surgical Site Infection1
Figure 2. Risk of surgical site infection in different risk index categories. The width of each bar is proportional to the sample size in that particular group; a) shows the traditional National Nosocomial Infection Surveillance (NNIS) risk index categories; b) shows a modified NNIS risk index with chronic disease score >5,000 substituted for ASA >3; c) shows a modified NNIS risk index, incorporating both chronic disease score >5,000 and the traditional NNIS risk index categories. In each group, the percentage of patients with infections is shown.