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01.01.2012 | Original Article | Ausgabe 1/2012

European Spine Journal 1/2012

Reliability and validity of the cross-culturally adapted French version of the Core Outcome Measures Index (COMI) in patients with low back pain

Zeitschrift:
European Spine Journal > Ausgabe 1/2012
Autoren:
Stéphane Genevay, Christine Cedraschi, Marc Marty, Sylvie Rozenberg, Pierre De Goumoëns, Antonio Faundez, Federico Balagué, François Porchet, Anne F. Mannion
Wichtige Hinweise

Electronic supplementary material

The online version of this article (doi:10.​1007/​s00586-011-1992-2) contains supplementary material, which is available to authorized users.

Abstract

Purpose

To conduct a cross-cultural adaptation of the Core Outcome Measures Index (COMI) into French according to established guidelines.

Methods

Seventy outpatients with chronic low back pain were recruited from six spine centres in Switzerland and France. They completed the newly translated COMI, and the Roland Morris disability (RMQ), Dallas Pain (DPQ), adjectival pain rating scale, WHO Quality of Life, and EuroQoL-5D questionnaires. After ~14 days RMQ and COMI were completed again to assess reproducibility; a transition question (7-point Likert scale; “very much worse” through “no change” to “very much better”) indicated any change in status since the first questionnaire.

Results

COMI whole scores displayed no floor effects and just 1.5% ceiling effects. The scores for the individual COMI items correlated with their corresponding full-length reference questionnaire with varying strengths of correlation (0.33–0.84, P < 0.05). COMI whole scores showed a very good correlation with the “multidimensional” DPQ global score (Rho = 0.71). 55 patients (79%) returned a second questionnaire with no/minimal change in their back status. The reproducibility of individual COMI 5-point items was good, with test–retest differences within one grade ranging from 89% for ‘social/work disability’ to 98% for ‘symptom-specific well-being’. The intraclass correlation coefficient for the COMI whole score was 0.85 (95% CI 0.76–0.91).

Conclusions

In conclusion, the French version of this short, multidimensional questionnaire showed good psychometric properties, comparable to those reported for German and Spanish versions. The French COMI represents a valuable tool for future multicentre clinical studies and surgical registries (e.g. SSE Spine Tango) in French-speaking countries.

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Zusatzmaterial
Supplementary material (DOCX 16 kb)
586_2011_1992_MOESM1_ESM.docx
Literatur
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