Reliability and Clinically Important Improvement Thresholds for Osteoarthritis Pain and Function Scales: A Multicenter Study

Journal of Rheumatology - Tập 41 Số 3 - Trang 509-515 - 2014
Jasvinder A. Singh1,2,3,4,5,6, Ruili Luo7,8,9,10,2,11,12,5,13,14, Gene Landon7,8,9,10,2,11,12,5,13,14, María E. Suarez‐Almazor7,8,9,10,2,11,12,5,13,14
1Center for Surgical Medical Acute Care Research and Transitions, Birmingham VA Medical Center
2Departments of Health Sciences Research and Orthopedic Surgery, Mayo Clinic School of Medicine, Rochester, Minnesota
3Division of Epidemiology, School of Public Health, University of Alabama, Birmingham, Alabama
4From the Medicine Service, Birmingham VA Medical Center and Department of Medicine, University of Alabama
5Section of Rheumatology and Clinical Immunology, University of Texas, M.D. Anderson Cancer Center
6St. Luke's Episcopal Health System, Houston, Texas, USA
7 Episcopal Health System;
8Alabama, USA
9Birmingham VA Medical Center and
10Department of Medicine, University of Alabama; Center for Surgical Medical Acute Care Research and Transitions, Birmingham VA Medical Center; Division of Epidemiology, School of Public Health, University of Alabama, Birmingham, Alabama;
11Departments of Health Sciences Research and Orthopedic Surgery, Mayo Clinic School of Medicine; R. Luo, PhD, Section of Rheumatology and Clinical Immunology, University of Texas, M.D. Anderson Cancer Center;
12Medicine Service, Center for Surgical Medical Acute Care Research and Transitions, Birmingham VA Medical Center, and Department of Medicine, University of Alabama, and Division of Epidemiology, School of Public Health, University of Alabama, and
13Section of Rheumatology and Clinical Immunology, University of Texas, M.D. Anderson Cancer Center; St. Luke's Episcopal Health System, Houston, Texas, USA.
14University of Alabama, Faculty Office Tower 805B, 510 20th Street S, Birmingham, Alabama 35294, USA.

Tóm tắt

Objective.To assess the reliability and clinically meaningful thresholds of intermittent and constant osteoarthritis pain (ICOAP) score, the Knee injury and Osteoarthritis Outcome Score Physical function Short-form (KOOS-PS), the Hip disability and Osteoarthritis Outcome Score Physical function Short-form (HOOS-PS), and the Quality of life subscales of HOOS/KOOS (HOOS-QOL/KOOS-QOL) in patients with knee or hip arthritis.Methods.One hundred and ninety-five patients (141 knee, 54 hip) seen at 2 orthopedic outpatient clinics with a diagnosis of knee or hip OA completed patient-reported questionnaires (ICOAP pain scale, KOOS-PS, HOOS-PS, KOOS-QOL, HOOS-QOL) at baseline and 2-week followup. Reliability was assessed using intraclass correlation coefficients (ICC). We calculated minimum clinically important difference (MCID) and moderate improvement in the subgroup that reported change in the status of their affected joint.Results.The reliability as assessed by ICC was as follows: ICOAP pain scale, 0.63 (0.48, 0.74) in patients with knee arthritis, and 0.86 (0.73, 0.93) for hip arthritis; KOOS-PS, 0.66 (0.52, 0.77); HOOS-PS, 0.82 (0.66, 0.91); KOOS-QOL, 0.79 (0.69, 0.86); and HOOS-QOL, 0.67 (0.42, 0.83). MCID and moderate improvement estimates in patients with knee arthritis were ICOAP pain scale, 18.5 and 26.7; KOOS-PS, 2.2 and 15.0; and KOOS-QOL, 8.0 and 15.6. A smaller sample in patients with hip arthritis precluded MCID and moderate improvement estimates.Conclusion.We found that ICOAP pain and KOOS-PS/HOOS-PS scales were reasonably reliable in patients with hip OA. Reliability of these scales was much lower in patients with knee arthritis. Thresholds for clinically meaningful change in pain or function on these scales were estimated for patients with knee arthritis.

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Journal of Rheumatology

Tập 41 Số 3

509-515

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