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Background. Patient-reported outcomes (PRO) play a significant role in interpreting treatment results. The HOOS is a popular patient-completed questionnaire used to assess hip joint function and quality of life. To date, there is no official Russian version of HOOS that has undergone all the language adaptation and validation procedures.

The aim of the study — to perform the cross-cultural and linguistic adaptation of the HOOS questionnaire for assessing quality of life in patients with hip joint pathology, as well as to validate the Russian version of the questionnaire, and test it in patients with hip osteoarthritis undergoing surgical treatment.

Methods. The study included 125 patients with hip osteoarthritis requiring surgical treatment. The first stage involved translating the questionnaire into Russian. The second stage involved validating the Russian version of HOOS to assess its reliability, validity, and sensitivity. Statistical analysis included calculation of Cronbach’s alpha, ICC correlations, application of the Wilcoxon signed-rank test for paired comparisons in related groups, and the Spearman’s rank correlation coefficient. Results. The values of Cronbach’s alpha for certain domains of HOOS ranged from 0.92 to 0.98, indicating good internal consistency of the questionnaire. The reproducibility of the questionnaire was evidenced by a significant correlation between domain scores upon retesting (ICC>0.7; p<0.001). Acceptable convergent and content validity of the questionnaire, as well as its sensitivity to changes in hip joint function post-surgery were demonstrated. The results of the HOOS questionnaire testing showed its informative value for assessing hip joint function before and after surgery.

Conclusion. The findings indicate the reliability, validity, and sensitivity of the Russian-language version of HOOS, as well as its suitability for assessing the hip joint condition in patients undergoing surgical treatment.