Abstract
OBJECTIVE: To develop a new foot impact scale to assess foot status in rheumatoid arthritis (RA) using established qualitative methodology and the latest item response techniques (Rasch analysis).
METHODS: Foot problems in RA were explored by conducting qualitative interviews that were then used to generate items for a new foot impact scale. Further validation was undertaken following postal surveys and Rasch analysis.
RESULTS: Analysis of the first postal survey (n = 192 responses) produced a 63-item binary response, 4-subscale instrument. The 4 subscales covered the domains impairment, activities, participation, and footwear. Following test-retest postal surveys and additional analysis, the instrument was reduced to a 2 subscale, 51-item questionnaire covering the domains of impairments/shoes and activities/participation. Initial results of these subscales indicate good psychometric properties, external validity, and test-retest reliability.
CONCLUSION: A foot impact scale to assess the impact of RA and to measure the effect of interventions has been developed. The 2 scales comprising the instrument demonstrate good psychometric properties.
| Original language | English |
|---|---|
| Pages (from-to) | 418-22 |
| Number of pages | 5 |
| Journal | Arthritis & Rheumatism |
| Volume | 53 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 15 Jun 2005 |
Keywords
- Adult
- Aged
- Aged, 80 and over
- Arthritis, Rheumatoid
- Data Collection
- Female
- Foot
- Humans
- Interviews as Topic
- Male
- Middle Aged
- Psychometrics
- Shoes