Table 4. Association of sports type and outcomes by sex.

Outcomes		Boys					Girls
		No. (%)	Unadjusted OR		Adjusted OR		No. (%)	Unadjusted OR		Adjusted OR
			OR	95% CI	OR	95% CI		OR	95% CI	OR	95% CI
Traumatic brain injury
	Field sports	903/5,314 (17.0)	1.00		1.00		31/175 (17.7)	1.00		1.00
	Floor sports	313/2,098 (14.9)	0.86	0.75–0.99	0.87	0.76–1.01	44/325 (13.5)	0.73	0.44–1.20	0.77	0.46–1.30
	Bicycle and street sports	98/478 (20.5)	1.26	1.00–1.59	1.66	1.24–2.20	33/216 (15.3)	0.84	0.49–1.43	2.21	1.17–4.18
	Racket sports	14/373 (3.8)	0.19	0.11–0.33	0.19	0.11–0.33	10/112 (8.9)	0.46	0.21–0.97	0.46	0.21–1.00
	Othersa	174/1,113 (15.6)	0.91	0.76–1.08	1.00	0.83–1.20	66/513 (12.9)	0.69	0.43–1.09	1.07	0.64–1.77
Intracranial injury
	Field sports	55/5,314 (1.0)	1.00		1.00		2/175 (1.1)	1.00		1.00
	Floor sports	23/2,098 (1.1)	1.06	0.65–1.73	1.12	0.68–1.83	2/325 (0.6)	0.54	0.08–3.84	0.62	0.09–4.53
	Bicycle and street sports	17/478 (3.6)	3.53	2.03–6.13	4.22	2.02–8.82	8/216 (3.7)	3.33	0.70–15.88	6.03	1.07–34.08
	Racket sports	2/373 (0.5)	0.52	0.13–2.12	0.59	0.14–2.43	1/112 (0.9)	0.78	0.07–8.70	0.78	0.07–8.85
	Othersa	14/1,113 (1.3)	1.22	0.68–2.20	1.53	0.81–2.87	4/513 (0.8)	0.68	0.12–3.74	1.17	0.20–6.87
Hospital admission
	Field sports	199/5,314 (3.7)	1.00		1.00		4/175 (2.3)	1.00		1.00
	Floor sports	70/2,098 (3.3)	0.89	0.67–1.17	0.94	0.71–1.24	2/325 (0.6)	0.27	0.05–1.46	0.28	0.05–1.55
	Bicycle and street sports	24/478 (5.0)	1.36	0.88–2.10	2.06	1.21–3.50	10/216 (4.6)	2.08	0.64–6.73	2.92	0.77–11.06
	Racket sports	20/373 (5.4)	1.46	0.91–2.34	1.58	0.98–2.55	8/112 (7.1)	3.29	0.97–11.19	3.26	0.94–11.29
	Othersa	31/1,113 (2.8)	0.74	0.50–1.08	0.88	0.59–1.32	9/513 (1.8)	0.76	0.23–2.51	0.94	0.27–3.32

OR = odds ratio, CI = confidence interval.

^aWater sports group was incorporated into others groups.