Table 1 Head impact frequency counts for ASF positions documented from 32 regular season games played from 2009–2015.

From: A novel repetitive head impact exposure measurement tool differentiates player position in National Football League

Player Position

Confirmed Impacts

Suspected Impacts

Pile-up

NFL Career

Total freq. #

Per Game (ave. ± SD)

Per Season (16 games)

ave. yrs.

est. freq. #

># games

est. freq. #

QB

73

2.3 ± 2.0

36.5

23

7

3.08

112

302

694.6

RBa***

468

14.6 ± 5.4

234

186

106

2.42

566.3

226

3299.6

WR

106

3.3 ± 2.9

53

33

7

2.21

117.1

303

999.9

TEa***

459

14.3 ± 6.1

229.5

34

10

2.67

612.8

270

3861.0

OLa***b*

637

19.9 ± 8.3

318.5

31

15

3.67

1168.9

296

5890.4

DLa***b***c*

706

22.1 ± 8.5

353

71

53

3

1059

282

6232.2

LBa***

377

11.8 ± 4.6

188.5

82

22

3

566

278

3280.4

DB

115

3.6 ± 2.5

57.5

38

10

3.17

182

295

1062.0

  1. *significant at p < 0.05; **significant at p < 0.005; ***significant at p < 0.001.
  2. asignificant difference to QB, WR & DB, bsignificant difference to LB, csignificant difference to RB.
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