Article

A questionnaire was introduced by the New Zealand
Arthroplasty Registry for use when evaluating the outcome of total ankle
replacement surgery. We evaluated the reliability, validity, and responsiveness
of the modified Swedish version of the questionnaire (SEFAS) in patients with
osteoarthritis or inflammatory arthritis before and/or after their ankle was
replaced or fused. The questionnaire was translated into
Swedish and cross-culturally adapted according to a standardized procedure. It
was sent to 135 patients with ankle arthritis who were scheduled for or had
undergone surgery, together with the foot and ankle outcome score (FAOS), the
short form 36 (SF-36) score,
and the EuroQol (EQ-5D) score. Construct validity
was evaluated with Spearman's correlation coefficient when comparing SEFAS with
FAOS, SF-36, and EQ-5D, content validity by calculating floor and ceiling
effects, test-retest reliability with intraclass correlation coefficient (ICC),
internal consistency with Cronbach's alpha (n = 62), agreement by Bland-Altman
plot, and responsiveness by effect size and standardized response mean (n = 37).
RESULTS: For construct validity, we correlated SEFAS with the other scores and
70% or more of our predefined hypotheses concerning correlations could be
confirmed. There were no floor or ceiling effects. ICC was 0.92 (CI 95%: 0.88-0.95), Cronbach's alpha 0.96, effect size was 1.44, and the standardized
response mean was 1.00. INTERPRETATION: SEFAS is a self-reported foot and ankle
score with good validity, reliability and responsiveness, indicating that the
score can be used to evaluate patients with osteoarthritis or inflammatory
arthritis of the ankle and outcome of surgery.

Langue : ANGLAIS