Validity, factor structure, and clinical relevance of the AUSCAN osteoarthritis hand index
Open Access
- 30 January 2006
- journal article
- research article
- Published by Wiley in Arthritis & Rheumatism
- Vol. 54 (2), 551-556
- https://doi.org/10.1002/art.21615
Abstract
Objective The Australian/Canadian (AUSCAN) Osteoarthritis Hand Index is a self‐report assessment of pain, stiffness, and function in patients with hand osteoarthritis (OA). Small studies have confirmed the reliability, construct validity, and responsiveness of this measure, but the factor structure has not been examined. In this study, we examined the clinimetric properties and clinical relevance of the AUSCAN index in a large sample of patients with familial hand OA. Methods The study group comprised 700 patients (80% female, mean age 69 years) who were part of a study on the genetics of generalized OA. All patients had radiographic hand OA bilaterally. The analyses examined internal consistency, factor structure, and relationships of the subscales to grip and pinch strength and a single‐item pain measure. Results Internal consistency was high for the total AUSCAN index and the subscales (Cronbach's α = 0.93–0.96). The AUSCAN function subscale had the strongest correlation with grip and pinch strength, and the pain subscale had the strongest correlation with the single‐item pain measure, thus supporting the construct validity of these subscales. Factor analysis showed that all pain and function items clearly loaded on the subscale they were intended to measure. Each 1‐unit increase in the AUSCAN function subscale was associated with a clinically relevant decrease in hand strength. Conclusion The results of this study strongly confirm the clinimetric properties of the AUSCAN index, including the validity of specific subscales. Results indicate that the AUSCAN index can measure meaningful changes in pain, stiffness, and function.Keywords
This publication has 16 references indexed in Scilit:
- Articular hypermobility is a protective factor for hand osteoarthritisArthritis & Rheumatism, 2004
- Does parallel item content on WOMAC's Pain and Function Subscales limit its ability to detect change in functional status?BMC Musculoskeletal Disorders, 2004
- Exploring the Factorial Validity and Clinical Interpretability of the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC)Physiotherapy Canada, 2003
- Dimensionality and clinical importance of pain and disability in hand osteoarthritis: Development of the Australian/Canadian (AUSCAN) Osteoarthritis Hand IndexOsteoarthritis and Cartilage, 2002
- Clinimetric properties of the AUSCAN Osteoarthritis Hand Index: an evaluation of reliability, validity and responsivenessOsteoarthritis and Cartilage, 2002
- Algo-functional assessment of knee osteoarthritis: comparison of the test–retest reliability and construct validity of the Womac and Lequesne indexesOsteoarthritis and Cartilage, 2002
- A cross-sectional study of the association between Heberden's nodes, radiographic osteoarthritis of the hands, grip strength, disability and painOsteoarthritis and Cartilage, 2001
- The Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC): a review of its utility and measurement propertiesArthritis & Rheumatism, 2001
- Validation of the Western Ontario and McMaster University Osteoarthritis Index in Asians with Osteoarthritis in SingaporeOsteoarthritis and Cartilage, 2001
- A new look at the Western Ontario and McMaster Universities Osteoarthritis Index using Rasch analysisArthritis & Rheumatism, 1999