A comparative study between different pain rating scales in patients of osteoarthritis.

Study was conducted to assess the sensitivity and simplicity of various pain rating scales in patients of osteoarthritis with chronic pain so that most appropriate scale can be identified. Scales included were Wong-Baker Faces Pain Rating Scale (WBS), Numerical Rating Scale (NRS), Faces Pain Scale- Revised (FPS-R), Visual Analogue Scale (VAS) and Verbal Rating Scale (VRS). Patients were asked to indicate their pain on these scales and comment about the simplicity of scales. Median mark for WBS, NRS, FPS-R, VAS and VRS was 10, 10, 10, 9.1 and 10 respectively. P value between WBS, NRS, FPS-R, VAS and VRS was insignificant. Most simple, easy to answer scale (83%) was WBS followed by FPS-R (17%). We conclude that all the scales are sensitive for assessment of the chronic osteoarthritis pain and are not different from each others. The most simple and preferred pain rating scale is WBS for the regional population.