The Journal of orthopaedic and sports physical therapy
-
J Orthop Sports Phys Ther · Apr 2004
Comparative StudyThe evaluation of change in pain intensity: a comparison of the P4 and single-item numeric pain rating scales.
Prospective observation study. ⋯ The findings of this study suggest the P4 is more adept at assessing change in pain intensity than popular versions of single-item NPRSs.