TABLE III.

Normalized Tensile Property and Knee Laxity Results Among Age Groups

Variable	Juvenile*	Adolescent*	Adult*	P Value
Yield load/intact (%)
No treatment	25 ± 4.8	13 ± 3.1	7 ± 2.1†	0.002‡
Collagen-platelet composite	32 ± 2.9	26 ± 2.8§	13 ± 1.7†#	<0.001‡
Max load/intact (%)
No treatment	24 ± 4.6	12 ± 3.0	8 ± 2.3†	0.006‡
Collagen-platelet composite	31 ± 2.5	23 ± 2.5§	12 ± 1.5†#	<0.001‡
Stiffness/intact (%)
No treatment	37 ± 5.8	29 ± 6.7	20 ± 5.4	0.086
Collagen-platelet composite	52 ± 4.4	52 ± 5.0§	30 ± 4.1†#	<0.001‡
Anteroposterior laxity at 60° – intact (mm)
No treatment	4.1 ± 0.27	3.8 ± 0.27	2.6 ± 0.30†#	<0.001‡
Collagen-platelet composite	3.9 ± 0.22	3.1 ± 0.25§	2.6 ± 0.34†	0.002‡

^*The data are given as the mean and the standard error of the mean.

^†Bonferroni post hoc analysis indicated p < 0.01 compared with juvenile group.

^‡Overall group differences based on repeated-measures analysis of variance with knee as a within-animal factor.

^§Compared with no treatment, the collagen-platelet composite effect was significant (p < 0.01).

^#Bonferroni post hoc analysis indicated p < 0.01 compared with the adolescent group.