SOFMER / SFETD
Le 14/10/2021 de 09:00 à 11:00
Développement d’une version courte de quatre PROs impliqués dans l’évaluation des croyances peur-évitement
Joane Le Carré (Sion, Suisse)
Objective : The fear-avoidance model (FAM) is one of the well-known models explaining the perpetuation of pain and disability. Combination of several Patients Reported Outcomes (PROs) instruments is necessary to assess the FAM but many patients considered them as heavy burden because they are time-consuming. The aim of this study was to propose a short version of the BPI, HADS, PCS and TSK questionnaires used to assess the fear-avoidance beliefs.
Material / Patients and Methods : The study was divided into two steps: 1) Reduction of the questionnaires (n=1363) based on quantitative analysis (internal consistency, Principal Component Analysis, Rasch analysis, floor and ceiling effect) and expert judgment of items. This method allowed to select items accordingly to their clinical relevance and their psychometric values. 2) Validation of the reduced questionnaires (n=65), including test-retest reliability, homogeneity (alpha-Cronbach), criterion validity (r=correlation to the long version) and determination of MCIDs.
Results : The four questionnaires in full version totalize 59 items. After reduction, a 9-item BPI, 6-item HADS, 5-item PCS and 6-item TSK remained (total 26 items). Psychometric properties of the reduced questionnaires were all acceptable (ICC=0.60-0.85, alpha=0.71-0.89, r=0.70-0.86, MCID=1 for the two subscales of BPI and HADS and 3 for the PCS and TSK) while keeping the structure and coherence of the long versions.
Discussion - Conclusion : The administration of the four shortened questionnaires takes only a few minutes and is therefore possible during a medical consultation, improving clinical care and thus providing a more efficient patient management. Likewise, these four short questionnaires may be used in longitudinal research to evaluate pain patient management effectiveness.
Keywords : fear-avoidance model, musculoskeletal pain, short version, BPI, HADS, PCS, TSK