Article

The main French language scales evaluating functioning after
lower-limb amputation have not undergone exhaustive psychometric validation.
OBJECTIVE: A transcultural validation of the Special Interest Group in Amputee
Medicine (SIGAM) mobility grades questionnaire, with 21 closed questions, as an
administered questionnaire. METHODS: The questionnaire translation,
back-translation and original-author validation was followed by a pretest with 5
patients to check comprehension. The psychometric properties of the scale were
validated with 49 patients at the definitive prosthesis stage by an investigator
via telephone. Criterion validity was evaluated by comparison with the Houghton
Scale score and construct validity by correlation between the questionnaire
scores and convergent dimensions (performing everyday activities and performing
transfers on a numerical rating scale [NRS], 2-min walk test) and divergent
dimensions (managing medication and stump skin care on an NRS). Internal
consistency was assessed by the Kuder-Richardson Formula 20 (KR-20) coefficient
and test-retest reproducibility by the Cohen kappa coefficient. RESULTS: The
resulting questionnaire was validated by the original author after the
back-translation. It showed good psychometric properties when administered by an
investigator as a self-reporting questionnaire, excellent criterion validity
(r=0.89, P<0.01), excellent reproducibility (kappa coefficient 0.87) and
satisfactory construct validity. The KR-20 coefficient was 0.67. CONCLUSION: The
French version of the SIGAM mobility grades questionnaire (SIGAM-Fr) has
satisfactory psychometric properties and can be administered in clinical
practice.
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Langue : ANGLAIS