Table 2

Count and incidence of anterior cruciate ligament sprains among enlisted members in the US Armed Forces, 2006–2018

Enlisted specialty	Special operations forces			Infantry			Mechanised/Armour			Artillery/Gunnery			Aviation			Engineers			Maintainance			Administration, intelligence and communication			Logistics			Maritime/Naval specialties			Total
Injuries (n)
	M	F	Total	M	F	Total	M	F	Total	M	F	Total	M	F	Total	M	F	Total	M	F	Total	M	F	Total	M	F	Total	M	F	Total	M	F	Total
Army	513	**	513	4445	**	4445	543	**	543	1474	80	1554	**	**	**	811	18	829	5957	537	6494	6097	1209	7306	3539	660	4199	29	1	30	24 634	3406	28 040
Navy	133	**	133	60	**	60	5	**	5	139	28	167	292	24	316	**	**	**	6570	788	7358	2256	445	2701	948	173	1121	518	77	595	12 512	1953	14 465
Air Force	**	**	**	**	**	**	**	**	**	**	**	**	264	21	285	**	**	**	5464	314	5778	3264	847	4111	1699	332	2031	**	**	**	12 177	2252	14 429
Marines	**	**	**	1855	**	1855	180	**	180	242	**	242	97	2	99	229	14	243	3179	152	3331	2609	290	2899	1247	100	1347	**	**	**	10 232	739	10 971
Total	646	**	646	6360	**	6360	728	**	728	1855	108	1963	653	47	700	1040	32	1072	21170	1791	22961	14226	2791	17017	7433	1265	8698	547	78	625	59 555	8350	67 905
Cumulative incidence (per 1000 person-years)
Army	6.3	**	6.3	5.5	**	5.5	5.4	**	5.4	5.8	7.1	5.8	**	**	**	5.7	5.9	5.7	5.5	5.1	5.5	5.4	3.8	5.1	6.0	5.0	5.8	5.3	1.5	4.8	5.2	4.6	5.1
Navy	5.9	**	5.9	4.5	**	4.5	3.2	**	3.2	4.0	4.7	4.1	5.2	4.4	5.1	**	**	**	4.4	3.6	4.3	4.5	2.8	4.1	4.7	3.3	4.4	4.6	2.8	4.2	4.3	3.3	4.1
Air Force	**	**	**	**	**	**	**	**	**	**	**	**	4.7	6.3	4.8	**	**	**	4.7	3.7	4.6	5.3	3.1	4.6	5.0	4.5	4.9	**	**	**	4.4	3.4	4.2
Marines	**	**	**	4.8	**	4.8	5.9	**	5.9	5.6	**	5.6	4.5	2.7	4.4	4.6	6.4	4.7	5.9	5.1	5.8	6.0	4.1	5.7	5.5	4.0	5.3	**	**	**	5.0	4.6	5.0
Total	6.2	**	6.2	5.3	**	5.3	5.5	**	5.5	5.6	6.3	5.6	4.9	4.9	4.9	5.5	6.1	5.5	4.9	4.1	4.9	5.3	3.4	4.9	5.4	4.5	5.3	4.6	2.8	4.3	4.8	3.9	4.6
Occupation codes	E011: Special Forces			E010: Infantry, General			Occupation: E020: Armour and Amphibious, General			E041: Artillery and Gunnery; E042: Rocket Artillery; E043: Missile Artillery, Operating Crew			E050: Air Crew, General; E051: Pilots and Navigators			E030: Combat Engineering, General			ENL7: Craftsworkers; ENL1: Electronic Equipment Repairers; ENL6: Electrical/Mechanical Equipment Repairers			ENL2: Communications and Intelligence Specialist; ENL5: Functional Support and Administration			ENL8: Service and Supply Handlers			E062: Small Boat Operators; E063: Seamanship, General; E060: Boatswains			All enlisted specialities

** no tactical-athletes in the population at-risk for these categories
F, female; M, male.