Table 2.

Cause of Injury, Days of Absence, and Injury Severity^a Extended on Next Page

Variable	Overall						Training
	2008–2009		2009–2010		IRR	P	2008–2009
	No.	Incidence	No.	Incidence			No.	Incidence
Cause of injury
Trauma	98	3.83 (3.14, 4.67)	99	4.35 (3.57, 5.30)	1.14 (0.86, 1.50)	.37	34	1.49 (1.06, 2.09)
Overuse	53	2.07 (1.58, 2.71)	50	2.20 (1.67, 2.90)	1.06 (0.72, 1.56)	.77	27	1.18 (0.81, 1.73)
Days of absence, median (quartiles)	6 (3–13)		8 (3–22)			.33	7 (3–12)
Injury severity
All injuries	151	5.90 (5.03, 6.82)	149	6.55 (5.58, 7.69)	1.11 (0.89, 1.39)	.37	61	2.67 (2.08, 3.44)
Minimal	43	1.68 (1.25, 2.27)	45	1.98 (1.48, 2.65)	1.18 (0.78, 1.79)	.45	17	0.75 (0.46, 1.20)
Mild	44	1.72 (1.28, 2.31)	28	1.23 (0.85, 1.78)	0.72 (0.45, 1.15)	.17	17	0.75 (0.46, 1.20)
Moderate	44	1.72 (1.28, 2.31)	50	2.20 (1.67, 2.90)	1.28 (0.85, 1.92)	.24	18	0.79 (0.49, 1.25)
Severe	20	0.78 (0.50, 1.10)	26	1.14 (0.78, 1.68)	1.46 (0.82, 2.62)	.20	9	0.39 (0.21, 0.76)

Abbreviation: IRR, incidence rate ratio.

^aIRRs compare the 2009–2010 season with the 2008–2009 season using the z statistic.

^bP < .05.