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Tracks change on a 0 to 10 numeric rating scale and compares it with the commonly used clinically important difference of two points or 30 percent.
Pain score change
Reduction (%) = (baseline - current) / baseline x 100; a fall of 2 points or 30% is the usual minimum clinically important difference
Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.
Trials in acute and chronic pain consistently find that around a third reduction is the smallest change patients call meaningful.
No. They track change within one person rather than comparing severity between individuals.