Research Article
Adaptation and Validation of the Foot Function Index-Revised Short Form into Polish
Table 3
Diagnostic validity.
| | ACR revised classification of functional status in RA | 1 | 2 | 3 | 4 | = 0,002
Kruskal-Wallis Test | | FFI-RS (mean) | 51.1 ± 15 | 62.2 ± 15.5 | 65.6 ± 13.5 | 81.6 ± 11.1 |
| | Disease duration in years | 1–5 | 6–10
| 11–20
| >20
| < 0,0001
Kruskal-Wallis Test | | FFI-RS | 55.4 ± 16.1 | 58.1 ± 17.7 | 64.5 ± 14.3 | 68.7 ± 10.9 |
| | MTP joint pain | No | Yes | = 0,048
Mann-Whitney Test | | FFI-RS, pain | 54.6 ± 16.7 | 60.2 ± 16.5 |
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Results are expressed as mean (SD); FFI-RS: Foot Function Index-Short Form.
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