The Short Musculoskeletal Function Assessment: a study of the reliability, construct validity and responsiveness in patients sustaining trauma:

Objective:To assess test–retest reliability, construct validity and responsiveness of the Dutch Short Musculoskeletal Function Assessment (SMFA-NL) in patients who sustained acute physical trauma.Design:A longitudinal cohort study.Setting:A level 1 trauma center in The Netherlands.Subjects:Patients who required hospital admission after sustaining an acute physical trauma.Intervention:Patients completed the SMFA-NL at six weeks, eight weeks and six months post-injury.Main measure:The measures used were The Dutch Short Musculoskeletal Function Assessment. Test–retest reliability (between six and eight weeks post-injury) using intraclass correlation coefficients, the smallest detectable change and Bland and Altman plots. Construct validity (six weeks post-injury) and responsiveness (between six weeks and six months post-injury) were evaluated using the hypothesis testing method.Results:A total of 248 patients (mean age: 46.5, SD: 13.4) participated, 145 patients completed the retest questionnaires (eight wee...