The Numeric Pain Rating Scale (NPRS) is a popular method to assess pain. Recently, the Patient-Reported Outcomes Measurement Information System (PROMIS) has been suggested to be more accurate in measuring pain. This study aimed to compare NPRS and PROMIS Pain Interference (PI) scores in a population of foot and ankle patients to determine which method demonstrated a stronger correlation with preoperative and postoperative function, as measured by PROMIS Physical Function (PF).
Prospective PROMIS PF and PI and NPRS data were obtained for 8 common elective foot and ankle surgical procedures. Data were collected preoperatively and postoperatively at a follow-up visit at least 6 months after surgery. Spearman correlation coefficients were calculated to determine the relationship among NPRS (0-10) and PROMIS domains (PI, PF) pre- and postoperatively. A total of 500 patients fit our inclusion criteria.
PROMIS PF demonstrated a stronger correlation to PROMIS PI in both the pre- and postoperative settings (preoperative: ρ = -0.66; postoperative: ρ = -0.69) compared with the NPRS (preoperative: ρ = -0.32; postoperative:ρ = -0.33). Similar results were found when data were grouped by Current Procedural Terminology (CPT) code.
PROMIS PI was a superior tool to gauge a patient’s preoperative level of pain and functional ability. This information may assist surgeons and patients in setting postoperative functional expectations and pain management.
Source: Foot and Ankle International.
Author: Bernstein, D. N., Kelly, M., Houck, J. R., Ketz, J. P., Flemister, A. S., DiGiovanni, B. F., . . . Oh, I. (2018).https://www.ncbi.nlm.nih.gov/pubmed/30282475