Figure 2.

Prevalence of ALI and ARDS by clinical risk condition. The proportion of patients with each clinical risk condition who went on to develop acute lung injury (ALI; blue columns) or acute respiratory distress syndrome (ARDS; red columns) is shown for all patients (a) and for only those admitted to the intensive care unit (b). In both panels the number of patients at risk with each clinical insult is displayed numerically below each category label.