Development of a Danish Language Version of the Manchester Foot Pain and Disability Index : Reproducibility and Construct Validity Testing

Abstract EN

Introduction.

The Manchester Foot Pain and Disability Index (MFPDI) is a 19-item questionnaire for the assessment of disability caused by foot pain.

The aim was to develop a Danish language version of the MFPDI (MFPDI-DK) and evaluate its reproducibility and construct validity.

Methods.

A Danish version was created, following a forward-backward translation procedure.

A sample of 84 adult patients with foot pain was recruited.

Participants completed two copies of the MFPDI-DK within a 24- to 48-hour interval, along with the Medical Outcomes Study Short Form 36 (SF-36), and a pain Visual Analog Scale (VAS).

Reproducibility was assessed using the intraclass correlation coefficient (ICC) and 95% limits of agreement (Bland-Altman plot).

Construct validity was evaluated with Pearson’s Rho, using a priori hypothesized correlations with SF-36 subscales and VASmean.

Results.

The MFPDI-DK showed very good reliability with an ICC of 0.92 (0.88–0.95).

The 95% limits of agreement ranged from −6.03 to 6.03 points.

Construct validity was supported by moderate to very strong correlations with the SF-36 physical subscales and VASmean.

Conclusion.

The MFPDI-DK appears to be a valid and reproducible instrument in evaluating foot-pain-related disability in Danish adult patients in cross-sectional samples.

Further research is needed to test the responsiveness of the MFPDI-DK.