Table 4.

Association of level of aggression and injury mechanism (contact/no contact), re-injuries and severity of injuries

Injury mechanism (contact)	AO	AG	Total	X2	P value
No contact	1	21	22	10.37	0.02
Contact with player	7	32	39
Contact with object	1	–	1		df=3
Total	9	53	62
Re-injury
Yes	–	3	3	1.10	0.30
No	9	50	59		df=1
Total	9	53	62
Severity
Slight	–	7	7	7.03	0.13
Minor	3	16	19
Moderate	6	26	32
Severe	–	4	4		df=4
Total	9	53	62

AG, tendency to aggression; AO, tendency to anger.