Table 1 Descriptive statistics of the sample (n = 86)

Age in years

15.1 (1.6)

12.2–19.6

Number of days between the date of concussion and assessment

8.8 (10.7) Median = 6

1–89

Frequency

Percent

Sex (male)

52

60

History of ADHD

8

9

Previously diagnosed with a concussion

27

31

Number of previously diagnosed concussions

 1

19

22

 2

8

9

Sport where concussion was sustained^a

 Football

32

38

 Soccer

12

14

 Baseball/softball

1

1

 Hockey

1

1

 Cheerleading

3

4

 Basketball

14

16

 Lacrosse

1

1

 Volleyball

2

2

 Wrestling

4

5

 Swimming

2

2

 Rugby

1

1

 Other sport activity

12

14