The Simple Shoulder Test (SST-Sp) is a widely used outcome measure.
The purpose of this study was to develop and validate a Spanish-version SST (SST-Sp).
A two-stage observational study was conducted. The SST was initially cross-culturally adapted to Spanish through double forward and backward translation and then validated for its psychometric characteristics. Participants (n = 66) with several shoulder disorders completed the SST-Sp, DASH, VAS and SF-12. The full sample was employed to determine factor structure, internal consistency and concurrent criterion validity. Reliability was determined in the first 24–48 h in a subsample of 21 patients.
The SST-Sp showed three factors that explained the 56.1 % of variance, and the internal consistency for each factor was α = 0.738, 0.723 and 0.667, and reliability was ICC = 0.687–0.944. The factor structure was three-dimensional and supported construct validity. Criterion validity determined from the relationship between the SST-Sp and DASH was strong (r = −0.73; p < 0.001) and fair for VAS (r = −0.537; p < 0.001). Relationships between SST-Sp and SF-12 were weak for both physical (r = −0.47; p < 0.001) and mental (r = −0.43; p < 0.001) dimensions.
The SST-Sp supports the findings of the original English version as being a valid shoulder outcome measure with similar psychometric properties to the original English version.
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The authors are grateful to the volunteers for their participation.
Conflict of interest
No competing financial interests exist.
Appendix 1: The Spanish version of the SST
Appendix 1: The Spanish version of the SST
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Membrilla-Mesa, M.D., Tejero-Fernández, V., Cuesta-Vargas, A.I. et al. Validation and reliability of a Spanish version of Simple Shoulder Test (SST-Sp). Qual Life Res 24, 411–416 (2015). https://doi.org/10.1007/s11136-014-0760-2