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· DOS Abstracts
Validation of the Danish version of the Musculo-
skeletal Tumour Society Score (MSTS) question-
naire – a measurement of functional outcome for
sarcoma patients
Casper Sæbye, Johnny Keller, Thomas Baad-Hansen
Department of Orthopaedic Surgery, Sarcoma Center at Aarhus University
Hospital, Aarhus, Denmark
Background:
The Musculoskeletal Tumour Society Score (MSTS) questionnaire
is a physician/patient-completed questionnaire designed to assess functional
outcome for patients with sarcomas in the extremities.
Purpose / Aim of Study:
The purpose of this study was to validate the Danish
version of the MSTS questionnaire.
Materials and Methods:
The MSTS was translated according to international
guidelines. Patients operated for sarcomas and aggressive benign tumours were
invited to participate in the study. The psychometric properties of the Danish
version of the MSTS were tested in terms of validity and reliability. Spearman’s
rank coefficient was used to test the validity by comparing with the Toronto
Extremity Salvage Score (TESS). The Intraclass Correlation Coefficient (ICC)
was used to evaluate inter- and intra-rater reliability. Cronbach’s alpha was used
to test for internal consistency. Spearman’s rank coefficient was used to com-
pare the MSTS lower extremity version with the objective test, Timed Up & Go
(TUG).
Findings / Results:
240 patients (78 upper/162 lower extremity) partici-
pated in the study. 38% and 23% of the patients scored maximum in the upper
and lower extremity version of the MSTS, respectively. The validity was found
to be good. The inter-rater reliability and the intra-rater reliability was found
to be excellent for the upper and lower extremity version of the MSTS. The
internal consistency for the upper and lower extremity version was good. When
comparing the lower extremity MSTS score with the TUG, we found a poor cor-
relation.
Conclusions:
The psychometric properties have shown good validity and reli-
ability of the Danish MSTS version. However, this study found a ceiling effect in
the MSTS score. Furthermore, the MSTS score seems not to be an expression of
objective functional outcome.
No conflicts of interest reported
144.