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Table 2 Frequencies and rates of soccer-related head injuries reported within the NCAA ISS between 2004/05 and 2008/09

From: Multifactorial examination of sex-differences in head injuries and concussions among collegiate soccer players: NCAA ISS, 2004–2009

Frequencies and rates (per 1000 AEs) of head injuries among men and women, by categories of competition level, setting and injury mechanism

Frequencies and rates (per 1000 AEs) of head injuries by categories of sex, competition level, setting and injury mechanism

Explanatory variable

Men

Frequency of Head Injuries (Rate per 1000 AEs)

Women

Frequency of Head Injuries (Rate per 1000 AEs)

Women vs. Men Rate Ratio [95% Wald CI]

Frequency of Head Injuries (Rate per 1000 AEs)

Unadjusted Rate Ratio [95% Wald CI]

Sex

 -Women

n/a

n/a

n/a

486 (0.87)

 

 -Men

n/a

n/a

n/a

374 (0.71)

1.23 [1.08, 1.41]

Competition level

 -Division I

153 (0.71)

224 (0.89)

1.25 [1.02, 1.54]

377 (0.81)

 

 -Division II & III

221 (0.71)

262 (0.86)

1.21 [1.01, 1.45]

483 (0.78)

1.03 [0.90, 1.18]

Setting

 -Game

250 (2.19)

341 (2.49)

1.14 [0.97, 1.34]

591 (2.36)

 

 -Practice

124 (0.30)

145 (0.35)

1.15 [0.91, 1.46]

269 (0.32)

7.29 [6.32, 8.43]

Mechanism

 -Player-to-player contact

305 (0.58)

306 (0.55)

0.95 [0.81, 1.11]

611 (0.56)

 

 -All other mechanisms

69 (0.13)

180 (0.32)

2.48 [1.87, 3.26]

249 (0.23)

2.45 [2.12, 2.84]