“…Taking into account the instruments included in the studies (Table 2), a total of 8 tools were identified, four of which were variants or sub-scales of other main tools. In terms of specific questionnaires, we found: The Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) [33–36,44], composed by 24 Likert-type items designed to assess pain, stiffness and physical function; two different versions of the WOMAC Short Form, each composed of 11 items with 5 Likert-type items [35,37]; The WOMAC Short Form (Function dimension) composed of 7 items validated to assess functionality in joint replacement [38]; The Pain and Function of the Hip scale (PFH) composed of 9 Likert-type items to assess pain, function and mobility/strength [41,42,45]; The Osteoarthritis Knee and Hip Quality of Life (OAKHQOL) composed of 43 Likert-type items, 40 of which are used to assess physical activity, mental health, pain, social support and social functioning [39]; The Mini-OAKHQOL composed of 20 Likert-type items to assess the same dimensions as the long version (OAKHQOL); and the Harris Hip Score (HHS), with 10 Likert-type items that assess pain, function, amplitude of movement and absence of deformity [43].…”