Influence of type I collagen polymorphisms and risk of anterior cruciate ligament rupture in athletes: a case-control study

Table 2 Clinical characteristics of the ACL injury-related information in the athletes

Variables	Injured Group (N = 146)^a	Contact ACL injury (N = 67)	Non-contact ACL injury (N = 67)	P – value^b	OR (CI 95%)
	N (%)
ACL injury sporting event^c
Competition	72 (54.5)	42 (64.6)	30 (45.5)	0.06	1^d
Training	47 (35.7)	17 (26.2)	30 (45.5)		2.47 (1.16–5.27)
Competition and Training	13 (9.8)	6 (9.2)	6 (9.0)		1.40 (0.41–4.76)
Post-training knee pain
No	69 (47.3)	29 (43.3)	32 (47.8)	0.60	1^d
Yes	77 (52.7)	38 (56.7)	35 (52.2)	0.60	0.83 (0.42–1.65)
Surgery number^e
1	73 (78.5)	37 (82.2)	36 (75.0)	0.40	1^d
≥ 2	20 (21.5)	8 (17.8)	12 (25.0)	0.40	1.54 (0.56–4.21)
ACL injury recurrence^f
No	113 (83.7)	55 (82.1)	58 (86.6)	0.48	1^d
Yes	22 (16.3)	12 (17.9)	9 (13.4)	0.48	0.71 (0.28–1.82)
Time away from training
1 to 3 months	43 (29.5)	22 (32.8)	19 (28.4)	0.87	1^d
4 to 6 months	37 (25.3)	17 (25.4)	17 (25.4)		1.16 (0.47–2.88)
7 to 9 months	38 (26.0)	15 (22.4)	19 (28.4)		1.47 (0.59–3.66)
≥ 10 months	28 (19.2)	13 (19.4)	12 (17.9)		1.07 (0.39–2.89)

OR is the Odds ratio; CI is the confidence interval
^aContact or non-contact ACL injury-related information was obtained from 134 athletes
^bP-value ≤0.05 was obtained through the Chi-squared Test (Pearson P-value) to compare contact and non-contact ACL injuries
^cInformation was obtained from 132 athletes (65 contact ACL injuries, 66 non-contact ACL injury and 1 without information about contact or non-contact ACL injury)
^dReference value
^eInformation was obtained from 93 athletes (45 contact ACL injury and 48 non-contact ACL)
^fInformation was obtained from 135 athletes

ISSN: 1471-2474