Moderate or severe pain was present in 12 knees, primarily because of tibiofemoral arthritis but also from lateral patellar subluxation (1 knee) and trochlear soft-tissue impingement (2 knees).

• 12个膝盖存在中到重度的疼痛，主要是不仅仅由于胫骨股骨关节炎，还有内侧髌骨半脱位（1个膝盖）和滑车软组织受到撞击（2个膝盖）。