AIS reflects the severity of single injuries and is unaffected by which three aspects?

The Abbreviated Injury Scale (AIS) is designed to rate the severity of single injuries in a consistent manner. The correct answer highlighting aspects that do not influence the AIS reflects the core principles of how severity is assessed.

The AIS specifically focuses on the individual injury's severity, independent of other factors that might influence clinical outcomes like time to treatment, the presence of sequela (long-term effects), or the ultimate outcome of the injury. This approach allows for clear comparisons of injury severity without being swayed by variations in patient demographics or treatment processes.

Other choices include factors that can affect clinical outcomes or treatment quality, but they are not integral to the AIS's function of measuring severity. For instance, factors such as age or treatment methods can indeed influence recovery but do not change how severity is rated in the AIS framework. Time-related aspects (like the timing of treatment) and recovery factors (treatment outcomes) are also external to the immediate injury assessment that the AIS conducts.