Figure 2

Life threat risk estimated from emergency calls according to the severity of the patients' condition. The vertical axis displays the percentage likelihood of each patient facing a life threat risk. The horizontal axis defines the percentage of patients categorized into each condition which are defined as: death confirmed at the scene, resulted in death at emergency departments (EDs), life-threatening condition with occurrence of cardiac and/or pulmonary arrest (CPA), life-threatening condition without CPA, serious condition but not life-threatening, moderate condition, and mild condition. Each defined point in the figure represents one patient transported by ambulance. For instance, this figure shows that patients whose life threat risk is higher than 10% account for approximately 80% of the patients whose condition resulted in death at the ED.