Journal of Sports Science and Medicine

Table 4. Impacts to the head greater than 10g in youth Australian Football players by magnitude groups and impact location for head impact telemetry severity profile and risk weighted exposure combined (linear and rotational) probability for number of impacts recorded, impact duration and impact magnitude. Data are presented as mean (± standard deviation) and median [25^th to 75^th interquartile range].

Players not reporting a notable head impact

Players reporting a notable head impact

Impact
Duration (ms)

Head Impact Telemetry
severity profile (HIT_SP)

Risk Weighted Exposure
combined probability (RWE_CP)

Impact
Duration (ms)

Head Impact Telemetry
severity profile (HIT_SP)

Risk Weighted Exposure
combined probability (RWE_CP)

n (%)

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^b

13.2 [11.7-15.2]

18.1

.005 [.0002-.0013]

.006

21 (80.8)

9.2 ±6.9^a

13.1 [10.9-14.9]

20.5

.0012 [.0005-.0026]

.102

20.0-29.9

76 (16.8)

13.0 ±6.3

21.7 [19.7-24.5]

28.3

.0108 [.0032-.0374]

.615

4 (15.4)

14.8 ±4.1

22.5 [17.9-25.6]

.0067 [.0007-.1726]

30.0-39.9

42 (9.3)

17.0 ±6.9

30.8 [26.7-36.3]

43.8

.0413 [.0064-.1995]

.965

40+

33 (7.3)

17.3 ±8.6

51.4 [42.0-72.1]

133.7

.6795[.1346-.9058]

.997

1 (3.8)

10-

76.3

PRA
(deg/s²)

<143,182

175 (38.6)

12.7 ±2.5

11.9 [11.2-13.4]

16.3

.0002 [.002-.0004]

.0006

7 (26.9)

8.3 ±6.6

11.7 [10.0-17.1]

.0003 [.0002-.0006]

143,239-429,661

225 (49.7)

10.7 ±6.2

17.3 [14.4-22.0]

34.7

.0030[.0012-.0107]

.0456

17 (65.4)

9.2 ±7.6

14.1 [12.0-15.8]

64.6

.0015 [.0008-.0053]

.019

429,718-716,140

40 (8.8)

16.8 ±8.3

38.7 [27.1-51.8]

98.6

.3461 [.2043-.7210]

.918

2 (7.7)

12.5 ±.7

23.3

.1687

716,197+

13 (2.9)

17.0 ±8.9

44.9 [33.0-60.2]

.9814 [.9250-.9967]

HIT_SP

<21

333 (73.5)

7.8 ±6.5

13.5 [11.9-15.9]^b

19.4

.0006 [.0002-.0018]

.011

23 (88.5)

9.4 ±6.9

13.2 [11.0-15.4]^a

20.6

.0009 [.0006-.0022]

.093

21-43

92 (20.3)

15.0 ±6.6

27.0 [23.1-31.4]

39.8

.0254 [.0080-.1232]

.922

2 (7.7)

16.0 ±5.7

25.4

.1193

43-63

19 (4.2)

20.7 ±8.3

51.1 [46.0-54.4]

63.3

.7890 [.2232-.9210]

.990

>63

9 (2.0)

20.4 ±9.4

93.0 [76.1-111.5]

.7890 [.6795-.9318]

1 (3.8)

10-

76.3

.0192

RWE_CP

.<2499

414 (91.4)

9.3 ±7.2^b

14.4 [12.3-18.8]

31.5

.0009 [.0003-.0045]

.048

26(100)

9.3 ±7.0^a

13.8 [11.5-17.5]

58.7

.0013 [.0006-.0053

.2500-.4999

12 (2.6)

17.5 ±8.4

35.2 [27.5-43.8

.3461 [.3065-.3908]

.5000-.7499

7 (1.5)

19.8 ±8.3

37.8 [31.1-84.7]

.6287 [.5690-.7117]

.7500+

21 (4.6)

17.7 ±9.1

52.0 [37.6-69.2]

152.7

.9210 [.8408-.9904]

.999