Availability of specific tools to assess patient reported outcomes in hip arthroplasty in Spain. Identifying the best candidates to incorporate in an arthroplasty register. A systematic review and standardized assessment

Purpose: 1) To systematically review the available scientific literature regarding specific instruments developed and/or tested in a Spanish population, to assess these PROMs in hip arthroplasty; 2) to carry out a standardized assessment of their measurement properties; and 3) to identify the best tools for use in Spain in an arthroplasty registry context. Methods: A systematic review of PubMed/MEDLINE and EMBASE and CINHAL was done. Furthermore, a standardized assessment of the questionnaires identified using the Evaluating the Measurement of Patient-Reported Outcomes (EMPRO) tool was performed. All developments, validation and studies aiming to assess the measurement properties of PROMs in hip arthroplasty in the Spanish population were included. Data from the questionnaires on metric properties was taken into account to identify the best candidates for inclusion in a register. Results: A total of 853 documents were found. After screening title and abstract, 13 full text documents were reviewed and 8 questionnaires adapted and validated to assess some of the aspects of hip arthroplasty in the Spanish population were identified. After the EMPRO assessment, 4 questionnaires showed suitable properties (WOMAC, OAKHQOL, mini-OAKHQOL and PFH). Conclusions: In Spain, there are a few suitable hip-specific questionnaires currently available to assess PROMs in hip arthroplasty surgery. Some of the more widely used questionnaires, like the OHS and HOOS, have not been validated in the Spanish population until now. Identified tools are suitable for use in a clinical context, however their use in an arthroplasty register is more questionable due to the lack of validation studies of the widely used tools in other registers.