ISAKOS Congress 2021

2021 ISAKOS Biennial Congress Paper

 

Pain Sensitivity Is Associated With Persistent Pain And Inferior Patient-Reported Outcomes Following Total Knee Arthroplasty

Man-Soo Kim, MD, PhD, Seoul KOREA, REPUBLIC OF
Yong Gyu Sung, MD, Seoul KOREA, REPUBLIC OF
Dong-Chul Park, MD, Seoul KOREA, REPUBLIC OF
Jae Jung Kim, MD, Seoul KOREA, REPUBLIC OF
Yong In, MD, PhD, Seoul KOREA, REPUBLIC OF

Seoul St. Mary's Hospital, Seoul, Seoul, KOREA, REPUBLIC OF

FDA Status Cleared

Summary

Pain sensitivity is a factor that is related to persistent postoperative pain and inferior PROM in patients undergoing primary TKAs.

Abstract

Introduction

The purpose of this study was to discover whether pain sensitivity was associated with postoperative pain and patient-reported outcome measures (PROMs) after total knee arthroplasty (TKA).

Methods

Pain sensitivity was evaluated preoperatively using a pain sensitivity questionnaire (PSQ). Resting, walking, nighttime, and average pain visual analog scale (VAS) were measured before surgery and 6 weeks, 3 months, 6 months, and 1 year after surgery. PROMs were also evaluated by the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) score and patient satisfaction. The association between pain VAS average score, WOMAC total score, and PSQ score (mild, moderate, and total score) were assessed at each stage.

Results

There were 59 patients with a high PSQ score (=5.2) and 53 with a low PSQ score (<5.2). Up to 1 year postoperatively, the group with high PSQ scores had higher resting, walking, nighttime, and average pain VAS scores than the group with low scores (all p 0.05). Worse preoperative pain, function, and WOMAC total scores continued till 1 year after surgery in the high-scoring PSQ group compared to the low-scoring group (all p<0.05). The group with low PSQ scores were more satisfied with surgery than those with high scores (p=0.027). There was a positive correlation between preoperative PSQ score and pain VAS average score at all time points (all p<0.05). A relationship between the PSQ score and WOMAC total score was also observed (all p<0.05).

Conclusion

Pain sensitivity is a factor that is related to persistent postoperative pain and inferior PROM in patients undergoing primary TKAs.

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