“…Decision-making is usually based on physical examination and 3-D clinical gait analysis, but the surgery outcome remains difficult to predict. Some decision-making tools have recently been developed to predict surgery outcome (Desailly et al, 2013;Hicks et al, 2011;Reinbolt et al, 2011), but most of these predictions are whether qualitative ('good' and 'bad' outcomes), or adapted to unique surgical procedures or gait patterns, which makes difficult to imagine how the patient would walk after the surgery. Galarraga et al (2017) predicts postoperative kinematics for several surgical combinations, but the contribution of each surgical procedure is unclear.…”