Table 2. Quantitative analysis of the CTX-II urine biomarker according to each group and results of the comparative testing.

	CTX-II Urine Concentration (ng/mL)
Groups	n	Mean	SD	Median	Minimum	Maximum	p -value
ACL (1)	10	8.9	0.7	9	7.7	9.8
Control (2)	10	6.7	2.6	7.2	0.7	9.4	p  = 0.009
Total	20	7.8	2.1	8.4	0.7	9.8

Abbreviations: ACL, anterior cruciate ligament; CTX-II, C-terminal cross-linked telopeptide of type-II collagen; SD, standard deviation.