Numeric Pain Rating Scale
What It Measures
The Numeric Pain Rating Scale asks one question: on a scale of 0 to 10, where 0 is no pain and 10 is the worst pain you can imagine, what number fits? It is the most widely used pain measure in clinical practice because it needs nothing but the question itself.
Three ratings are commonly taken — pain right now, and the best and worst pain over the past 24 hours — and averaged. Higher scores mean more pain. It measures intensity only. Two people reporting a 4 can be living completely different lives, one unable to sleep and the other still working, so the number is most useful alongside questions about what the pain is stopping the person from doing.
Additional Notes
Licensing Notes: The NPRS is a generic, unattributed method rather than a proprietary instrument. It is reproduced without restriction across clinical resources, trial protocols, and EHRs, and requires no license, fee, or equipment.
Learn More: The commonly cited minimal clinically important difference is about 2 points, but higher starting scores (above 7) are associated with larger MCID values, and one study of shoulder pain reported an MDC of 2.5 against an MCID of 1.1.
