“…Effects of the intervention analyzed in each study were measured through different outcome variables according to the type of analysis, type of intervention, pathology of the participants and the objectives of the study. Consequently, QALY was measured in all the studies conducting cost-utility analysis [ 13 , 14 , 17 , 18 , 20 , 21 , 22 , 27 , 28 , 31 , 32 , 34 , 39 , 40 , 41 , 42 , 43 , 46 , 49 , 50 , 51 , 54 ]. Other health outcomes were used including HRQL [ 14 , 27 , 28 , 31 ], daily life activities [ 22 , 52 ] or pain [ 13 ].…”