Hip and groin injury frequency and rate between 2008/2009 and 2015/2016 in European professional football
| Season | 2008/2009 | 2009/2010 | 2010/2011 | 2011/2012 | 2012/2013 | 2013/2014 | 2014/2015 | 2015/2016 | Total* |
| No. of team seasons | 14 | 18 | 20 | 21 | 23 | 28 | 28 | 28 | 268 |
| No. of injuries (%)† | 105/747 (14) | 144/840 (17) | 148/1000 (15) | 114/1018 (11) | 146/1003 (11) | 191/1274 (15) | 183/1230 (15) | 171/1155 (15) | 1812/12 736 (14) |
| No. of injured players (%)†† | 78/417 (19) | 110/527 (21) | 116/579 (20) | 93/657 (14) | 120/705 (17) | 151/893 (17) | 145/872 (17) | 137/887 (15) | 1401/7756 (18) |
| 1 injury | 57/78 (73) | 86/110 (78) | 91/116 (78) | 77/93 (83) | 98/120 (82) | 119/151 (79) | 112/145 (77) | 109/137 (80) | 1078/1401 (77) |
| 2 injuries | 16/78 (21) | 17/110 (15) | 19/116 (16) | 11/93 (12) | 18/120 (15) | 26/151 (17) | 28/145 (19) | 23/137 (17) | 253/1401 (18) |
| ≥3 injuries | 5/78 (6) | 7/110 (6) | 6/116 (5) | 5/93 (5) | 4/120 (3) | 6/151 (4) | 5/145 (3) | 5/137 (4) | 70/1401 (5) |
| No. of reinjuries (%) | 10/105 (10%) | 20/144 (14) | 21/148 (14) | 11/114 (10) | 14/146 (10%) | 12/191 (6) | 13/183 (7) | 10 (6) | 204/1812 (11) |
| No. of players with reinjury (%) | 9/78 (12%) | 14/110 (13) | 16/116 (14) | 9/93 (10) | 12/120 (10%) | 9/151 (6) | 11/145 (8) | 8/137 (6) | 163/1401 (12) |
| Injury rate (95% CI)§ | 1.1 (0.9 to 1.3) | 1.2 (1.0 to 1.4) | 1.1 (1.0 to 1.3) | 0.8 (0.7 to 0.9) | 1.0 (0.8 to 1.2) | 1.0 (0.9 to 1.1) | 0.9 (0.8 to 1.0) | 0.85 (0.7 to 1.0) | 1.0 (1.0 to 1.0) |
| Training | 0.7 (0.5 to 0.9) | 0.6 (0.5 to 0.8) | 0.7 (0.6 to 0.9) | 0.5 (0.4 to 0.6) | 0.6 (0.5 to 0.8) | 0.6 (0.5 to 0.7) | 0.6 (0.5 to 0.7) | 0.5 (0.4 to 0.6) | 0.6 (0.6 to 0.6) |
| Match play | 3.1 (2.3 to 4.) | 4.1 (3.3 to 5.1) | 3.2 (3.5 to 4.1) | 2.5 (2.0 to 3.2) | 2.8 (2.2 to 3.6) | 3.3 (2.7 to 4.0) | 2.3 (1.9 to 2.9) | 2.7 (2.2 to 3.3) | 3.1 (2.9 to 3.4) |
| Match-to-training injury RR (95% CI) | 4.5 (3.1 to 6.7) | 6.4 (4.6 to 8.9) | 4.5 (3.2 to 6.2) | 5.3 (3.7 to 7.7) | 3.6 (3.3 to 6.3) | 5.8 (4.4 to 7.8) | 3.8 (2.8 to 5.1) | 5.1 (3.8 to 7.0) | 5.3 (4.8–5.8) |
| Lay-off days, mean (SD) | 16 (21) | 18 (22) | 15 (21) | 20 (25) | 23 (43) | 13 (16) | 16 (24) | 15 (17) | 16 (23) |
*Data representing the whole study period 2001/2002 to 2015/2016 seasons.
†Percentage of hip and groin injuries out of the total number of injuries.
††Percentage of players with hip and groin injury out of the total number of players participating.
§Injury rate expressed as injuries/1000 hours exposure.
RR, rate ratio.