Will to fight
For each level of wound taken, that is the level you must beat on a WILL vs Victory chart to keep fighting.
For example:
light - apprentice (4-9)
Medium - average (10-18)
Solid - journeyman (19-27)
Also useful for torture and similar aptitudes, but replace wound levels for roll rating levels on the victory chart.
But my character is tougher than that!
STA determines if you must test.
STA of 1 full rank above will ignore test.
Example:
STA of 3 ignores test for Light
4 ignores Medium
5 ignores Solid
6 ignores Hard
Increased pain tolerance and similar effects will grant an exchange to the appropriate roll.