Abstract
Objectives. Pain catastrophizing is an exaggerated focus on pain sensations. It may be an independent factor influencing pain and functional outcomes of knee arthroplasty. We aimed to evaluate the association between pre-operative pain catastrophizing and pain and function outcomes up to one year after knee arthroplasty.
Methods. We used data from a cohort study of patients undergoing primary knee arthroplasty (either total knee replacement or unicompartmental knee replacement) for knee osteoarthritis. Pain catastrophizing was assessed pre-operatively using the Pain Catastrophizing scale (PCS). Other baseline variables included demographics, body mass index, radiographic severity, anxiety, depression, and knee pain and function assessed using the Western Ontario and McMaster University Index (WOMAC). Patients completed the WOMAC at 6- and 12-months after arthroplasty. WOMAC pain and function scores were converted to interval scale and the association of PCS and changes of WOMAC pain and function were evaluated in generalized linear regression models with adjustment with confounding variables.
Results. Of the 1136 patients who underwent arthroplasty (70% female, 84% Chinese, 92% total knee arthroplasty), 1102 and 1089 provided data at 6- and 12-months post-operatively. Mean (±SD) age of patients was 65.9 (±7.0) years. PCS was associated with a change in WOMAC pain at both 6-months (p=0.02) and 12-months (p=0.22) post-operative after adjustment in multivariable models; as well as change in WOMAC function at 6-months and 12-months.
Conclusion. In this large cohort study, pre-operative pain catastrophizing was associated with lower improvements in pain and function at 6-months and 12-months after arthroplasty.
Methods. We used data from a cohort study of patients undergoing primary knee arthroplasty (either total knee replacement or unicompartmental knee replacement) for knee osteoarthritis. Pain catastrophizing was assessed pre-operatively using the Pain Catastrophizing scale (PCS). Other baseline variables included demographics, body mass index, radiographic severity, anxiety, depression, and knee pain and function assessed using the Western Ontario and McMaster University Index (WOMAC). Patients completed the WOMAC at 6- and 12-months after arthroplasty. WOMAC pain and function scores were converted to interval scale and the association of PCS and changes of WOMAC pain and function were evaluated in generalized linear regression models with adjustment with confounding variables.
Results. Of the 1136 patients who underwent arthroplasty (70% female, 84% Chinese, 92% total knee arthroplasty), 1102 and 1089 provided data at 6- and 12-months post-operatively. Mean (±SD) age of patients was 65.9 (±7.0) years. PCS was associated with a change in WOMAC pain at both 6-months (p=0.02) and 12-months (p=0.22) post-operative after adjustment in multivariable models; as well as change in WOMAC function at 6-months and 12-months.
Conclusion. In this large cohort study, pre-operative pain catastrophizing was associated with lower improvements in pain and function at 6-months and 12-months after arthroplasty.
| Original language | English |
|---|---|
| Article number | 17174 |
| Journal | Scientific Reports |
| Volume | 14 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 26 Jul 2024 |
Bibliographical note
Publisher Copyright:© The Author(s) 2024.