Table II.

Lysholm scores before and after surgery in two groups (x̄±s, score).

Group (n)	Before surgery	12 months after surgery	24 months after surgery
Observation (31)	64.2±6.3	87.7±10.5	90.3±8.7
Control (37)	66.2±5.6	88.2±7.1	90.5±5.8
F time point, P		75.482, <0.001
F time point × group, P		2.077, 0.148
F group, P		0.109, 0.742