Table 2

Frequency, injury rate and injury recurrence of all ankle injury types in male professional football

	Number of injuries (%)	IR*	95% CI	Number of re-injuries (%)
Fracture and bone stress	22 (2.0)	0.021	0.014 to 0.032	1 (4.5)
Fractures	18 (1.7)	0.017	0.011 to 0.0027	1 (5.6)
Other bone stress	4 (0.4)	0.004	0.001 to 0.010	0
Joint and ligament	744 (68.9)	0.704	0.655 to 0.756	78 (10.5)
Dislocation/subluxation	3 (0.3)	0.003	0.001 to 0.009	0
Sprain/ligament injury	729 (67.5)	0.690	0.641 to 0.742	75 (10.3)
Capsular	67 (9.2)	0.063	0.050 to 0.081	5 (7.5)
Lateral	552 (75.7)	0.522	0.480 to 0.568	58 (10.5)
Medial	72 (9.9)	0.068	0.054 to 0.086	8 (11.1)
High	38 (5.2)	0.036	0.026 to 0.049	4 (10.5)
Cartilage lesion	12 (1.1)	0.011	0.006 to 0.020	3 (25.0)
Contusion	182 (16.9)	0.172	0.149 to 0.199	0
Laceration and skin lesion	10 (0.9)	0.010	0.005 to 0.018	1 (10.0)
Peripheral nervous system	2 (0.2)	0.002	0.001 to 0.008	0
Other	120 (11.1)	0.114	0.095 to 0.136	41 (34.2)
Synovitis	65 (6.0)	0.062	0.048 to 0.078	26 (40.0)
Impingement	32 (3.0)	0.030	0.021 to 0.043	4 (12.5)
Anterior	7 (0.6)	0.007	0.003 to 0.014	2 (28.6)
Posterior	25 (2.3)	0.024	0.016 to 0.035	2 (8.0)
Instability	7 (0.6)	0.007	0.003 to 0.014	3 (42.9)
Unspecified pain	12 (1.1)	0.011	0.006 to 0.020	3 (25.0)
Osteoarthritis	2 (0.2)	0.002	0.001 to 0.008	0
Sinus tarsi syndrome	2 (0.2)	0.002	0.001 to 0.008	1 (50.0)
Total	1080 (100)	1.022	0.962 to 1.084	121 (11.2)