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Spanish Translation, Cross-Cultural Adaptation, and Validation of the Olerud-Molander Ankle Score (OMAS) for Ankle
Marcos González-Alonso1, Ana R Trapote-Cubillas1, Francisco J Madera-González1
1University Hospital of Leon, Leon, Spain.
Background:
The aim of this study was to translate and cross-culturally adapt the Olerud-Molander Ankle Score (OMAS) into Spanish and to assess its reliability and validity.
Methods:
The translation and adaptation to develop the Spanish version of the OMAS (OMAS-Sp) was performed according to current international guidelines. The OMAS-Sp was administered to 98 patients with a surgically treated ankle fracture, and it was repeated 7-14 days later to assess construct reliability of each question's score and the total score. Test-retest reliability and the internal consistency were calculated, and concurrent validity was assessed by comparing the OMAS-Sp with the Foot and Ankle Outcome Score (FAOS). The presence of floor and ceiling effects was also analyzed.
Results:
Adequate internal consistency was found with a Cronbach α of 0.821. Excellent test-retest reliability was demonstrated with an interclass correlation coefficient for the total score of 0.970 (95% CI 0.956-0.980; P < .001). Spearman correlation coefficients (r's) between the OMAS-Sp total score and the 5 FAOS subscales ranged from 0.944 to 0.951 (P < .001). No floor or ceiling effects were found.
Conclusion:
The OMAS-Sp demonstrated adequate psychometric properties and is a valid and reliable tool for assessing outcomes in Spanish-speaking patients with surgically treated ankle fractures.
Level Of Evidence:
Level II, prospective cohort study.
