Table 4. Preoperative and Postoperative Range of Motion.

	CR group		PS group		p-value
	Mean ± SD	Range	Mean ± SD	Range
Preoperative	129 ± 11	100–140	123 ± 12	100–140	0.027*
6 Weeks	129 ± 9	110–150	129 ± 10	95–145	> 0.05†
3 Months	133 ± 8	120–150	130 ± 10	105–145
6 Months	133 ± 9	115–145	135 ± 7	115–145

CR: cruciate-retaining, PS: posterior-stabilized, SD: standard deviation.

^*Independent samples t-test. ^†Repeated measures ANOVA (analysis of variance).