Translation, cross-cultural adaptation, and reliability of the Argentine version of the hamstring outcome score (HaOS) questionnaire in subjects with a history of hamstring injury

Abstract

Objective: To translate and cross-culturally adapt the hamstring outcome score (HaOS) for Argentine subjects with a history of hamstring injuries, and to analyze its internal consistency and reliability.

Materials and methods: A prospective and longitudinal study was conducted in three phases: (1) translation of the HaOS from English into Spanish, (2) cross-cultural adaptation for the Argentine population, and (3) evaluation of its psychometric properties. Item-item and item-total correlations were analyzed using Pearson or Spearman coefficients, and reliability was assessed using a two-way random effects model (ICC2,1). Reliability was classified as poor (ICC <0.50), moderate (0.50-0.75), acceptable (0.75-0.90), or excellent (>0.90).

Results: Twenty-eight subjects (93 %) found no difficulties in answering the questionnaire during the pilot test. Seventeen (56.6 %) considered it normal, ten (33.3 %) easy, and four (13.3 %) very easy. The internal consistency of the HaOS was high, with a Cronbach's alpha of 0.935 (95 % CI: 0.903; 0.967) and an average item-item correlation of 0.317, indicating reasonable homogeneity. Item-total correlations ranged from -0.119 to -0.707, with a mean of -0.534. Test-retest reliability was excellent, with an ICC of 0.982 (95 % CI: 0.969; 0.989).

Conclusion: The translation, cross-cultural adaptation, internal consistency, and reliability of the HaOS for the Argentine population show that it is a reliable tool to assess function in subjects with hamstring injuries.