Table 5.

Comparison of knee joint ROM between the two groups after treatment [$\overline{x}$±s, °].

Group	N	Week 1	Week 2	Week 4	Week 8
C group	50	46.53 ± 3.41	61.52 ± 5.20a	78.42 ± 6.45b	98.77 ± 8.67c
R group	50	49.47 ± 3.60	64.38 ± 5.32a	86.93 ± 6.72b	104.20 ± 9.11c
t		4.192	2.718	6.460	3.053
P		0.0001	0.008	0.0001	0.003

Note: compared with the first week, aP < 0.05; compared with the second week, bP < 0.05; compared with the 4th week, cP < 0.05.