Figure 4.

Combined Physical and Mental Fatigability Vector

The vector displays concentric circles, beginning with no fatigue in the center, then radiating out for increasing levels of fatigue (mild, moderate, and extreme). Around the perimeter of the vector, we have added the range of survey items, such as posture management, attending a sporting event, wheelchair use over an uneven surface, home adaptation issues, and pressure management.

Each survey item, such as home adaptation, has its own spoke in the wheel of the proposed a Fatigability Vector, so when, for example, someone answers the question on home adaptation, they have the four answer choices. The vector captures a hypothetical full response plot where physical and mental fatigability are overlaid, which can be linked and filled with color to show the overall fatigability footprint.