BT: bone tumour; EF: emotional function; GH: global health; ns: significance not specified; OS: osteosarcoma; PCS: physical component score; PF: physical function. 1Minus (−): poorer in comparison; plus (+): better; equals (=): no difference. 2Direction of significance, i.e., better or worse, based on the first comparator, or the last time point if a longitudinal comparison. 3Result based on overall or summary scores; if these were not provided, result at domain score level was provided (QLQ-C30 functional scale only). 4Based on SF-36 and bone tumour-specific measure results reflecting the comparison across the whole sample.