American Academy of Pediatrics

TABLE 2

Comparison of Sport-Related Concussion Rates Among High School Athletes During the 2013–2014 to 2017–2018 Academic Years

Sport	Girls Versus Boys, IRR (95% CI)
Sport	Competition	Practice	Overall
Basketball	2.94 (2.51 to 3.44)^a	1.25 (0.99 to 1.57)	2.28 (2.01 to 2.59)^a
Cross country	N/A	1.46 (0.39 to 5.42)	2.33 (0.70 to 7.75)
Soccer	2.33 (2.08 to 2.62)^a	2.06 (1.63 to 2.61)^a	2.30 (2.07 to 2.55)^a
Softball or baseball	1.89 (1.45 to 2.45)^a	3.05 (2.10 to 4.42)^a	2.21 (1.79 to 2.74)^a
Swimming	1.74 (0.52 to 5.78)	1.78 (0.94 to 3.38)	1.77 (1.01 to 3.12)^a
Track and field	1.72 (0.80 to 3.71)	1.61 (0.81 to 3.22)	1.66 (0.995 to 2.78)
Sex-comparable sports overall^b	2.47 (2.26 to 2.70)^a	1.73 (1.50 to 1.99)^a	2.22 (2.07 to 2.39)^a

Sport	Girls Versus Boys, IRR (95% CI)
Sport	Competition	Practice	Overall
Basketball	2.94 (2.51 to 3.44)^a	1.25 (0.99 to 1.57)	2.28 (2.01 to 2.59)^a
Cross country	N/A	1.46 (0.39 to 5.42)	2.33 (0.70 to 7.75)
Soccer	2.33 (2.08 to 2.62)^a	2.06 (1.63 to 2.61)^a	2.30 (2.07 to 2.55)^a
Softball or baseball	1.89 (1.45 to 2.45)^a	3.05 (2.10 to 4.42)^a	2.21 (1.79 to 2.74)^a
Swimming	1.74 (0.52 to 5.78)	1.78 (0.94 to 3.38)	1.77 (1.01 to 3.12)^a
Track and field	1.72 (0.80 to 3.71)	1.61 (0.81 to 3.22)	1.66 (0.995 to 2.78)
Sex-comparable sports overall^b	2.47 (2.26 to 2.70)^a	1.73 (1.50 to 1.99)^a	2.22 (2.07 to 2.39)^a

N/A, not applicable.

Denotes statistical significance (IRR, 95% CI does not include 1.00).

Only includes sports in which both sexes participated (ie, soccer, basketball, baseball or softball, cross country, swimming, and track and field).