How are survivors sorted during Triage?

Survivors are sorted during triage by the urgency of their treatment needs. This method is crucial in emergency situations, particularly during mass casualty incidents, where resources may be limited and there is a need to prioritize care effectively. The primary goal of triage is to ensure that those who are most critically injured and in need of immediate medical attention receive it first, thereby maximizing the chances of survival for as many patients as possible.

In triage, healthcare providers assess each patient's condition based on the severity of their injuries and the immediacy of their treatment requirements. This process helps in efficiently allocating medical resources and personnel to those who require them the most urgently, such as individuals with life-threatening conditions.

The other options do not accurately represent the primary criteria used in triage. Sorting by level of pain, age and gender, or previous medical history may occur in other contexts but not as the primary method during triage, where the focus is on the urgency of treatment to address life-threatening situations first.