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Psychometric properties of the Dutch Short Musculoskeletal Function Assessment (SMFA) questionnaire in patients with a fracture of the upper or lower extremity

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Abstract

Purpose

This prospective study examined the psychometric properties of the adapted Dutch translation of the Short Musculoskeletal Function Assessment (SMFA) questionnaire in patients with isolated unilateral lower fracture (LEF) or upper extremity fracture (UEF).

Methods

Patients (N = 458) completed the SMFA, WHOQOL-BREF, and the RAND-36 at time of diagnosis (i.e. pre-injury status), 1, and 2 weeks post-fracture. Principal axis factoring was performed, and Cronbach’s alpha coefficients (α) and intra-class correlation coefficients (ICC) were calculated. Furthermore, Pearson’s product-moment correlations (r), paired t tests, and standardized response means (SRM) were calculated.

Results

A three-factor structure was found: Lower extremity dysfunction, Upper extremity dysfunction, and Daily life consequences. This structure was different for patients with LEF versus UEF. ICCs ranged from .68 to .90, and α varied from .81 to .95. The correlations between the SMFA and, respectively, the RAND-36 and WHOQOL-BREF were small to large depending on the SMFA factor combined with fracture location. Responsiveness was confirmed (p < .0001; SRM ranging from .28 to 1.71).

Conclusions

The SMFA has good psychometric properties in patients with fractures. Patients with UEF and LEF could not be regarded as a homogenous group. The development of separate SMFA modules should be considered.

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Authors and Affiliations

  1. CoRPS, Department of Medical Psychology and Clinical Psychology, Tilburg University, P.O. Box 90153, 5000 LE, Tilburg, The Netherlands

    M. A. C. Van Son, B. L. Den Oudsten, J. A. Roukema & J. De Vries

  2. Department of Education and Research, St. Elisabeth Hospital, Tilburg, The Netherlands

    B. L. Den Oudsten

  3. Department of Surgery, St. Elisabeth Hospital, Tilburg, The Netherlands

    M. A. C. Van Son, J. A. Roukema & M. H. J. Verhofstad

  4. Department of Orthopaedics, St. Elisabeth Hospital, Tilburg, The Netherlands

    T. Gosens

  5. Department of Surgery, Erasmus MC, Rotterdam, The Netherlands

    M. H. J. Verhofstad

  6. Department of Medical Psychology, St. Elisabeth Hospital, Tilburg, The Netherlands

    J. De Vries

Authors
  1. M. A. C. Van Son
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  2. B. L. Den Oudsten
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  3. J. A. Roukema
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  4. T. Gosens
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  5. M. H. J. Verhofstad
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  6. J. De Vries
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Correspondence to J. De Vries.

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Van Son, M.A.C., Den Oudsten, B.L., Roukema, J.A. et al. Psychometric properties of the Dutch Short Musculoskeletal Function Assessment (SMFA) questionnaire in patients with a fracture of the upper or lower extremity. Qual Life Res 23, 917–926 (2014). https://doi.org/10.1007/s11136-013-0529-z

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