TABLE A2.
Frequency and Rate of Game-Related High School Football Injuries Between Artificial Turf Infill Systems by Specific Location of Body Traumaa
| Infill Weight | ||||||||
|---|---|---|---|---|---|---|---|---|
| ≥9.0 lb/ft2
(n = 528) |
6.0-8.9 lb/ft2
(n = 521) |
3.0-5.9 lb/ft2
(n = 525) |
0.0-2.9 lb/ft2
(n = 263) |
|||||
| Variable | n | IIR (95% CI) | n | IIR (95% CI) | n | IIR (95% CI) | n | IIR (95% CI) |
| Specific body location | ||||||||
| Head | 76 | 1.4 (1.2-1.8) | 73 | 1.4 (1.1-1.7) | 93 | 1.8 (1.5-2.1) | 40 | 1.5 (1.1-2.0) |
| Face/oral and maxillofacial | 7 | 0.1 (0.1-0.3)b | 22 | 0.4 (0.3-0.6)b | 27 | 0.5 (0.4-0.7)c | 8 | 0.3 (0.2-0.6)b |
| Neck | 22 | 0.4 (0.3-0.6)b,h | 23 | 0.4 (0.3-0.7)b | 48 | 0.9 (0.7-1.2)c | 50 | 1.9 (1.5-2.4)i |
| Shoulder girdle | 136 | 2.6 (2.2-3.0)d,f | 217 | 4.2 (3.7-4.6)e | 271 | 5.2 (4.7-5.6)g | 148 | 5.6 (5.0-6.2)g |
| Upper arm | 19 | 0.4 (0.2-0.6)b | 22 | 0.4 (0.3-0.6)b | 49 | 0.9 (0.7-1.2)c | 20 | 0.8 (0.5-1.1)b |
| Elbow | 25 | 0.5 (0.3-0.7) | 35 | 0.7 (0.5-0.9) | 49 | 0.9 (0.7-1.2) | 23 | 0.9 (0.6-1.3) |
| Forearm | 28 | 0.5 (0.4-0.8)b,f | 62 | 1.2 (0.9-1.5)c | 87 | 1.7 (1.4-2.0)g | 24 | 0.9 (0.6-1.3)b |
| Wrist | 12 | 0.2 (0.1-0.4) | 29 | 0.6 (0.4-0.8) | 13 | 0.2 (0.1-0.4) | 12 | 0.5 (0.3-0.8) |
| Hand | 25 | 0.5 (0.3-0.7) | 44 | 0.8 (0.6-1.1) | 50 | 1.0 (0.7-1.2) | 25 | 1.0 (0.7-1.4) |
| Finger | 18 | 0.3 (0.2-0.5)b | 29 | 0.6 (0.4-0.8)b | 43 | 0.8 (0.6-1.1)c | 11 | 0.4 (0.2-0.7)b |
| Thumb | 32 | 0.6 (0.4-0.8)b | 38 | 0.7 (0.5-1.0)b | 61 | 1.2 (0.9-1.5)c | 23 | 0.9 (0.6-1.3)b |
| Upper back/spine | 9 | 0.2 (0.1-0.3) | 10 | 0.2 (0.1-0.4) | 6 | 0.1 (0.1-0.2) | 7 | 0.3 (0.1-0.5) |
| Lower back | 27 | 0.5 (0.4-0.7) | 40 | 0.8 (0.6-1.0) | 34 | 0.6 (0.5-0.9) | 14 | 0.5 (0.3-0.9) |
| Chest/sternum/ribs | 17 | 0.3 (0.2-0.5)b | 28 | 0.5 (0.4-0.8)b | 38 | 0.7 (0.5-1.0)b | 22 | 0.8 (0.6-1.2)c |
| Abdomen | 6 | 0.1 (0.1-0.2) | 3 | 0.1 (0.0-0.2) | 7 | 0.1 (0.1-0.3) | 1 | 0.0 (0.0-0.2) |
| Pelvis/hips/buttocks | 19 | 0.4 (0.2-0.6) | 26 | 0.5 (0.3-0.7) | 24 | 0.5 (0.3-0.7) | 23 | 0.9 (0.6-1.3) |
| Groin | 7 | 0.1 (0.1-0.3) | 9 | 0.2 (0.1-0.3) | 5 | 0.1 (0.0-0.2) | 1 | 0.0 (0.0-0.2) |
| External genitalia | 2 | 0.0 (0.0-0.1) | 2 | 0.0 (0.0-0.1) | 0 | 0.0 (0.0-0.0) | 0 | 0.0 (0.0-0.0) |
| Upper leg | 61 | 1.2 (0.9-1.5) | 76 | 1.5 (1.2-1.8) | 79 | 1.5 (1.2-1.8) | 48 | 1.8 (1.4-2.3) |
| Knee/patella | 116 | 2.2 (1.9-2.6)b | 162 | 3.1 (2.7-3.5)c | 142 | 2.7 (2.3-3.1)b | 96 | 3.7 (3.1-4.2)c |
| Lower leg | 88 | 1.7 (1.4-2.0)d,f | 121 | 2.3 (2.0-2.7)d | 184 | 3.5 (3.1-3.9)e | 112 | 4.3 (3.7-4.9)g |
| Ankle | 123 | 2.3 (2.0-2.7)d | 192 | 3.7 (3.3-4.1)e | 190 | 3.6 (3.2-4.0)e | 90 | 3.4 (2.9-4.0)e |
| Heel/Achilles tendon | 3 | 0.1 (0.0-0.2) | 5 | 0.1 (0.0-0.2) | 11 | 0.2 (0.1-0.4) | 1 | 0.0 (0.0-0.2) |
| Foot | 27 | 0.5 (0.4-0.7) | 34 | 0.7 (0.5-0.9) | 49 | 0.9 (0.7-1.2) | 19 | 0.7 (0.5-1.1) |
| Toe | 12 | 0.2 (0.1-0.4) | 22 | 0.4 (0.3-0.6) | 30 | 0.6 (0.4-0.8) | 6 | 0.2 (0.1-0.5) |
aWilks λ specific body location of trauma (F 38,4612 = 2.132; P = .0001). IIR, injury incidence rate (calculated as [number of injuries/number of team games] × 10).
Statistically significant at b,cP < .05, d,eP < .01, f,gP < .001, h,iP < .0001.