“…Twenty-two studies were included, of which 10 came from AOB 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 and 12 from RBO 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 ( Table 1 ). Evaluation of the inter-observer reliability (S1 and S2) for the Jadad score resulted in a kappa value of 0.611 (substantial, excellent).…”