Table 3. Impacts to the head greater than 10g in youth Australian Football players for magnitude groups and impact location for resultant peak linear and rotational accelerations, for number of impacts recorded, impact duration and impact magnitude. Data are presented as mean (± standard deviation) and median [25th to 75th interquartile range]. |
|
|
n (%) |
Players not reporting a notable head impact |
Players reporting a notable head impact |
Impact
Duration (ms) |
Peak Linear
Acceleration (PLA(g)) |
Peak Rotational Acceleration
(PRA(deg/ s2)) |
Impact
Duration (ms) |
Peak Linear
Acceleration (PLA(g)) |
Peak Rotational Acceleration
(PRA(deg/ s2)) |
| Mean ±SD |
Median [IQR] |
95th |
Median [IQR] |
95th |
n (%) |
Mean ±SD |
Median [IQR] |
95th |
Median [IQR] |
95th |
| PLA(g) |
10.0-19.9 |
302 (66.7) |
13.6 ±2.3 |
12.9 [11.0-15.3] |
19.2 |
131,156 [77,739-195,780] |
288,198 |
21 (80.8) |
9.2 ±6.9 |
12.7 [11.5-16.5] |
19.7 |
158,979 [123,524-202,535] |
482,706 |
| 20.0-29.9 |
76 (16.8) |
13.0 ±6.3 |
23.7 [21.5-26.0] |
29.3 |
307,403 [235,434-394,894] |
643,260 |
4 (15.4) |
14.8 ±4.1 |
21.8 [21.6-25.8] |
- |
230,306 [129,357-479,778] |
- |
| 30.0-39.9 |
42 (9.3) |
17.0 ±6.9 |
33.8 [32.4-36.3] |
39.2 |
372,211 [253,093-498,995] |
821,965 |
- |
- |
- |
- |
- |
- |
| 40+ |
33 (7.3) |
17.3 ±8.6 |
49.4 [43.0-64.2] |
113.6 |
539,205 [398,481-694,505] |
902,930 |
1 (3.8) |
10- |
62.8 |
- |
220,503 |
- |
PRA
(deg/s2) |
<143,182 |
175 (38.6) |
12.7 ±2.5 |
11.7 [10.5-13.8] |
19.6 |
83,795 [59,095-116,517] |
138,226 |
7 (26.9) |
8.3 ±6.6 |
11.7 [10.9-20.7] |
- |
100,170 [52,231-118,364] |
- |
| 143,239-429,661 |
225 (49.7) |
10.7 ±6.2 |
18.0 [13.7-24.4] |
37.3 |
231,538 [188,263-298041] |
391,726 |
17 (65.4) |
9.2 ±7.6 |
13.6 [12.1-17.7] |
59.8 |
186,400 [147,474-231,567] |
373,282 |
| 429,718-716,140 |
40 (8.8) |
16.8 ±8.3 |
37.8 [27.8-48.9] |
106.5 |
539,033 [481,113-605,250] |
698,974 |
2 (7.7) |
12.5 ±0.7 |
20.5 |
- |
454,189 |
- |
| 716,197+ |
13 (2.9) |
17.0 ±8.9 |
37.8 [28.0-54.8] |
- |
846,219 [775,716-910.969] |
- |
0 |
- |
- |
- |
- |
- |
| HITSP |
<21 |
333 (73.5) |
7.8 ±6.5 |
13.3 [11.1-16.7] |
21.6 |
140,610 [81,744-209,519] |
323,228 |
23 (88.5) |
9.4 ±6.9 |
13.2 [11.7-17.0] |
24.9 |
154,750 [118,637-199,607] |
471,063 |
| 21-43 |
92 (20.3) |
15.0 ±6.6 |
30.3 [25.2-34.8] |
44.9 |
350,272 [264,827-469,338] |
776,879 |
2 (7.7) |
16.0 ±5.7 |
24.8 |
- |
376,932 |
- |
| 43-63 |
19 (4.2) |
20.7 ±8.3 |
47.3 [40.5-54.5] |
62.1 |
661,199 [459,163-709,958] |
895,894 |
- |
- |
- |
- |
- |
- |
| >63 |
9 (2.0) |
20.4 ±9.4 |
81.6 [66.0-109.3] |
- |
584,670 [463,523-768,783] |
- |
1 (3.8) |
10- |
62.8 |
- |
220,503 |
- |
| RWECP |
.<2499 |
414 (91.4) |
9.3 ±7.2b |
14.2 [11.6-20.3] |
35.8 |
163,883 [93,770-258,983] |
398,051 |
26(100) |
9.3 ±7.0a |
13.5 [12.0-18.4] |
49.9 |
164,851 [123,175-226,032] |
519,593 |
| .2500-.4999 |
12 (2.6) |
17.5 ±8.4 |
37.0 [28.1-40.5] |
- |
552,939 [536,873-564,398] |
- |
- |
- |
- |
- |
- |
- |
| .5000-.7499 |
7 (1.5) |
19.8 ±8.3 |
35.1 [32.2-87.1] |
- |
612,108 [517,994-634,648] |
- |
- |
- |
- |
- |
- |
- |
| .7500+ |
21 (4.6) |
17.7 ±9.1 |
48.5 [34.2-63.3] |
116.4 |
765,357 [668,298-868,335] |
1,228,055 |
- |
- |
- |
- |
- |
- |
|
SD = Standard Deviation; ms = milliseconds; IQR = interquartile [25th-75th] percentile; 95th = 95th percentile; Significant difference (p < 0.05) than (a) = Injured; (b) = Non-Injured |
|