Table 4.

Number and rates of practice-related injuries per 1000 player practice-hours among under-13, under-15 and under-18 youth ice hockey players by injury type and location.

	Under-13		Under-15		Under-18
	Number (/35)	Ratea (95% CI)	Number (/79)	Ratea (95% CI)	Number (/68)	Ratea (95% CI)
Injury location
Head/face	20	0.37 (0.25, 0.56)	35	0.29 (0.21, 0.40)	10	0.13 (0.07, 0.26)
Neck/throat	1	0.02 (0.00, 0.10)	0	0.00 (0.00, 0.03)	0	0.00 (0.00, 0.05)
Shoulder/clavicle	0	0.00 (0.00, 0.07)	4	0.03 (0.01, 0.08)	9	0.12 (0.05, 0.23)
Upper arm/elbow/forearm	0	0.00 (0.00, 0.07)	1	0.01 (0.00, 0.05)	2	0.03 (0.00, 0.10)
Wrist/hand	2	0.04 (0.00, 0.13)	8	0.07 (0.03, 0.13)	9	0.12 (0.05, 0.23)
Back/side	0	0.00 (0.00, 0.07)	0	0.00 (0.00, 0.03)	3	0.04 (0.01, 0.12)
Chest/ribs/abdomen	0	0.00 (0.00, 0.07)	0	0.00 (0.00, 0.03)	2	0.03 (0.00, 0.10)
Pelvis/hips/groin/upper leg	6	0.11 (0.04, 0.24)	2	0.07 (0.00, 0.06)	5	0.07 (0.02, 0.15)
Knee	2	0.04 (0.00, 0.13)	6	0.05 (0.02, 0.11)	6	0.08 (0.03, 0.17)
Lower leg/ankle/foot	1	0.02 (0.00, 0.10)	3	0.02 (0.01, 0.07)	6	0.08 (0.03, 0.17)
Other	0	0.00 (0.00, 0.07)	0	0.00 (0.00, 0.03)	0	0.00 (0.00, 0.05)
Missing/unknown	3	0.06 (0.01, 0.16)	20	0.17 (0.10, 0.28)	16	0.21 (0.10, 0.45)
Injury type
Contusion	5	0.09 (0.03, 0.22)	6	0.05 (0.02, 0.11)	5	0.07 (0.02, 0.15)
Concussion	20	0.37 (0.25, 0.56)	33	0.27 (0.20, 0.38)	10	0.13 (0.07, 0.26)
Joint/ligament sprain/dislocation	0	0.00 (0.00, 0.07)	10	0.08 (0.04, 0.18)	14	0.19 (0.10, 0.35)
Fracture	1	0.02 (0.00, 0.10)	5	0.04 (0.01, 0.10)	9	0.12 (0.05, 0.23)
Muscle strain/tendinitis	7	0.13 (0.05, 0.27)	3	0.02 (0.01, 0.07)	8	0.11 (0.05, 0.21)
Abrasion/bleeding/burn/cut/blister	0	0.00 (0.00, 0.07)	1	0.01 (0.00, 0.05)	1	0.01 (0.00, 0.07)
Other	0	0.00 (0.00, 0.07)	1	0.01 (0.00, 0.05)	0	0.00 (0.00, 0.05)
Missing/unknown	2	0.04 (0.00, 0.13)	20	0.17 (0.10, 0.28)	21	0.28 (0.14, 0.54)

^a Crude rates per 1000 practice-hours with 95% CIs adjusted for cluster by team. Exact CIs were calculated when number was less than 10.