Table 6.

lbow injury rates per 10,000 athlete-exposures (AEs) of elbow injuries among collegiate baseball student-athletes by division

	Injuries (n)	AEs (n)	Injury Rate* (per 10,000 AEs)	aIRR* (95% CI)
Total	281	804,740 d	2.4
Division I	141	356202	3.1	Referent
Division II	48	177757	2.1	0.68 (0.49, 0.79) 1.47 (1.26, 2.04) †
Division III	92	269745	2.6	0.86 (0.66, 1.12) 1.16 (0.89, 1.51) †
				DII vs DIII ‡: 0.80 (0.56, 1.14)

^*Adjusted by year and division;

^†aIRR expressed as inverse ratio for interpretation of Division I relative to Division II and Division III, as appropriate

^‡ Referent category for specific aIRR

^§ Total exposures and yearly exposures are greater than division exposures summary because of undefined division exposures

aIRR = adjusted injury rate ratio