DOS 2017

DOS Kongressen 2017 ·

UCLA Activity Scale: translation process and validation

study in a Danish knee osteoarthritis population

Anne Mørup-Petersen, Søren T. Skou, Christina Holm, Pætur Mikal Holm, Tobias Wiren-

feldt Klausen, Michael Rindom Krogsgaard, Mogens Berg Laursen, Anders Odgaard

Department of Orthopaedic Surgery, Copenhagen University Hospital, Gentofte; Re-

search Unit for Musculoskeletal Function and Physiotherapy, Department of Sports Sci-

ence and Clinical Biomechanics/ Department of Physiotherapy and Occupational Ther-

apy, University of Southern Denmark, Odense/ Næstved-Slagelse-Ringsted Hospitals,

Region Zealand, Slagelse; Department of Orthopaedic Surgery, Copenhagen University

Hospital, Rigshospitalet; Department of Physiotherapy and Occupational Therapy/ Re-

search Unit for Musculoskeletal Function and Physiotherapy, Department of Sports Sci-

ence and Clinical Biomechanics, Næstved-Slagelse-Ringsted Hospitals, Region Zealand,

Slagelse / University of Southern Denmark, Odense; Department of Hematology, Co-

penhagen University Hospital, Herlev ; Department of Orthopaedic Surgery, Copenhagen

University Hospital, Bispebjerg; Department of Orthopaedic Surgery, Aalborg University

Hospital, Aalborg & Farsø; Department of Orthopaedic Surgery, Copenhagen University

Hospital, Gentofte

Background:

UCLA Activity Scale (UAS) is a brief and widely acknowledged scale as-

sessing physical activity in hip and knee arthroplasty patients on a 10- level scale, where

“10” is very active.

Purpose / Aim of Study:

We aimed to translate and culturally adapt UAS for use in

Denmark and to test its validity in knee arthroplasty patients before or after surgery.

Materials and Methods:

Formal translation was made by a physiotherapist, a profes-

sional translator and an orthopaedic resident. The version agreed upon was edited, rede-

signed and culturally adapted through an iterative process including 22 lay persons and

55 patients. In the final test of 76 patients, each patient’s own rating (Pt) was compared

to his/her level according to a physiotherapist (Phys) and one of two orthopaedic resi-

dents (Ort) based on short, blinded interviews mimicking the normal clinical setting.

Findings / Results:

Eleven patients (mean age 67.3 y) were excluded due to marking

more than one level. The remaining 65 patients (66.5 y) had average ratings of 5.0 (Pt),

3.8 (Phys) and 4.4 (Ort). In 49% of cases the patient either agreed with one or both

examiners, or patient’s rating was between examiners’ ratings. Spearman correlation was

0.65 for Pt vs. Ort and 0.47 for Pt vs. Phys indicating strong and moderate correlations,

respectively. At retest (mean 8.3 days later), 21 of 38 patients reported to have “no

change in physical activity since the first test”. Thirteen (62%) of the 21 agreed per-

fectly with their own first test and five (23%) were one level away.

Conclusions:

The Danish UAS is a fast and fairly comprehensible tool for assessing pa-

tient- reported physical activity level in this population. Mixing time, intensity and fre-

quency is a potential threat to the credibility of UAS, and therefore responsiveness test-

ing and testing against more raters or objective measures is warranted.

No conflicts of interest reported