Table 5. .
Knee-Sprain Injury Activities by Specific Diagnosis in Youth, High School, and Collegiate Football Players, 2012 Through 2014 Seasons
| Level of Play |
Activity, No. (%) |
|||||||||
| Blocking |
Being Blocked |
Tackling |
Being Tackled |
Receiving Pass |
Running |
General Play |
Conditioning |
Other/Unknown |
Total |
|
| Youth | ||||||||||
| MCL | 1 (6.7) | 0 | 2 (13.3) | 5 (33.3)a | 2 (13.3)a,b | 2 (13.3) | 2 (13.3) | 0 | 1 (6.7) | 15 (100.0) |
| LCL | 0 | 1 (8.3) | 1 (8.3) | 4 (33.3) | 0 | 0 | 1 (8.3) | 3 (25.0) | 2 (16.7) | 12 (100.0) |
| ACL | 1 (50.0) | 0 | 0 | 1 (50.0) | 0 | 0 | 0 | 0 | 0 | 2 (100.0) |
| PCL | 0 | 0 | 1 (100.0)a,b | 0 | 0 | 0 | 0 | 0 | 0 | 1 (100.0) |
| Cap | 0 | 0 | 1 (33.3) | 1 (33.3) | 0 | 0 | 0 | 0 | 1 (33.3) | 3 (100.0) |
| Total | 2 (6.1) | 1 (3.0) | 5 (15.2) | 11 (33.3)a | 2 (6.1) | 2 (6.1) | 3 (9.1) | 3 (9.1)a,b | 4 (12.1) | 33 (100.0) |
| High school | ||||||||||
| MCL | 28 (19.4) | 12 (8.3) | 26 (18.1)c | 37 (25.7)c | 1 (0.7) | 11 (7.6) | 21 (14.6)d | 1 (0.7) | 7 (4.9) | 144 (100.0) |
| LCL | 9 (20.0) | 5 (11.1) | 7 (15.6) | 6 (13.3) | 3 (6.7) | 6 (13.3) | 5 (11.1) | 1 (2.2) | 3 (6.7) | 45 (100.0) |
| ACL | 15 (15.3) | 9 (9.2) | 15 (15.3) | 16 (16.3) | 0 | 17 (17.3) | 19 (19.4) | 0 | 7 (7.1) | 98 (100.0) |
| PCL | 3 (15.8) | 5 (26.3) | 5 (26.3) | 4 (21.1) | 0 | 2 (10.5) | 0 | 0 | 0 | 19 (100.0) |
| Cap | 1 (14.3) | 2 (28.6) | 0 | 2 (28.6) | 0 | 1 (14.3) | 1 (14.3) | 0 | 0 | 7 (100.0) |
| Total | 56 (17.9) | 33 (10.5) | 53 (16.9)c | 65 (20.8)c | 4 (1.3) | 37 (11.8) | 46 (14.7)d | 2 (0.6) | 17 (5.4) | 313 (100.0) |
| Collegiate | ||||||||||
| MCL | 52 (22.6) | 42 (18.3)d | 24 (10.4) | 31 (13.5) | 5 (2.2) | 12 (5.2) | 55 (23.9) | 0 | 9 (3.9) | 230 (100.0) |
| LCL | 5 (23.8) | 3 (14.3) | 2 (9.5) | 4 (19.0) | 3 (14.3) | 3 (14.3) | 1 (4.8) | 0 | 0 | 21 (100.0) |
| ACL | 12 (14.5) | 13 (15.7) | 5 (6) | 14 (16.9) | 4 (4.8) | 13 (15.7) | 18 (21.7) | 2 (2.4) | 2 (2.4) | 83 (100.0) |
| PCL | 1 (3.8) | 3 (11.5) | 1 (3.8) | 4 (15.4) | 2 (7.7) | 1 (3.8) | 11 (42.3) | 0 | 3 (11.5) | 26 (100.0) |
| Cap | 3 (21.4) | 0 | 2 (14.3) | 2 (14.3) | 0 | 2 (14.3) | 5 (35.7) | 0 | 0 | 14 (100.0) |
| Total | 73 (19.5) | 61 (16.3)d | 34 (9.1) | 55 (14.7) | 14 (3.7) | 31 (8.3) | 90 (24.1) | 2 (0.5) | 14 (3.7) | 374 (100.0) |
Abbreviations: ACL, anterior cruciate ligament; Cap, capsular sprain; LCL, lateral collateral ligament; MCL, medial collateral ligament; PCL, posterior cruciate ligament.
a
Youth estimate greater than collegiate estimate (injury proportion ratio [IPR] > 1.00).
b
Youth estimate greater than high school estimate (IPR > 1.00).
c
High school estimate greater than collegiate estimate (IPR > 1.00).
d
Collegiate estimate greater than high school estimate (IPR > 1.00).