TABLE 1.

Total number of ankle sprains and rates of ankle sprain per 10,000 athlete exposures by sport and type of exposure, High School Sports-Related Injury Surveillance Study, United States, 2005/06–2010/11.^a

		Rates
	Count	Total	Competition	Practice	Performance	RR (95% CI)b
Total	5373	3.13	6.30	2.02	0.44	3.13 (2.96–3.30)
Boys	3348	3.14	6.73	1.97		3.42 (3.20–3.66)
Girls	2025	3.11	5.69	2.10	0.44	2.71 (2.48–2.95)
Football	1667	4.67	15.01	2.55		5.88 (5.34–6.48)
Soccer
Boys	429	3.14	6.31	1.78		3.55 (2.92–4.30)
Girls	538	4.59	9.41	2.48		3.80 (3.19–4.52)
Volleyball
Boysc	15	4.24	5.05	3.83		1.32 (0.47–3.70)
Girls	452	3.90	4.10	3.79		1.08 (0.89–1.31)
Basketball
Boys	831	5.16	8.42	3.79		2.22 (1.94–2.55)
Girls	660	5.03	9.45	3.13		3.02 (2.59–3.52)
Wrestling	167	1.36	2.02	1.13		1.78 (1.30–2.43)
Baseball	112	0.91	1.57	0.55		2.86 (1.96–4.18)
Softball	140	1.50	2.74	0.85		3.24 (2.30–4.56)
Girls’ field hockeyd	57	1.78	2.89	1.28		2.26 (1.35–3.80)
Girls’ gymnasticsd	30	4.88	9.36	3.82		2.45 (1.17–5.15)
Boys’ ice hockeyd	16	0.72	1.40	0.40		3.51 (1.27–9.64)
Lacrossed
Boys	76	2.24	4.22	1.36		3.11 (1.97–4.90)
Girls	60	2.45	4.40	1.59		2.76 (1.66–4.59)
Swimming and divingd
Boys	0	0.00	0.00	0.00		N-Ae
Girls	2	0.06	0.00	0.08		N-Ae
Track and fieldd
Boys	35	0.45	0.48	0.44		1.09 (0.48–2.50)
Girls	61	0.98	1.96	0.75		2.61 (1.55–4.38)
Cheerleadingc	25	0.68	1.71	0.63	0.44	1.30 (0.56–3.01)f

^aRR, rate ratio; CI, confidence interval

^bCompares the ankle sprain rates during competition to rates during practice.

^cData collected from 2009/10–2010/11.

^dData collected from 2008/09–2010/11.

^eRate ratios could not be calculated because there were no competition ankle sprains.

^f“Performance” ankle sprains were combined with “Competition” for RR.