Table 4 Comparison of individual symptoms for athletes who sustained concussion in the early, mid, and late season

Headache

182 (43.54)

898 (43.21)

58 (59.18)

4.87

0.01

–

–

–

Nausea

12 (2.87)

48 (2.31)

2 (2.04)

0.26

0.77

–

–

–

Vomiting

40 (9.57)

332 (16.00)

16 (16.33)

5.71

0.003

–

–

–

Balance

62 (14.83)

426 (20.50)

38 (38.78)

14.38

< 0.001

0.02

< 0.001

< 0.001

Dizziness

86 (20.57)

490 (23.58)

40 (40.82)

9.12

< 0.001

0.38

< 0.001

< 0.001

Fatigue

40 (9.57)

276 (13.28)

14 (14.29)

2.27

0.10

–

–

–

Falling asleep

58 (13.88)

400 (19.25)

32 (32.65)

9.63

< 0.001

0.03

0.003

< 0.001

Sleeping more

34 (8.14)

190 (9.14)

18 (18.37)

5.14

0.06

–

–

–

Sleeping less

30 (7.17)

190 (9.14)

14 (14.29)

2.54

0.08

–

–

–

Drowsiness

86 (20.57)

566 (27.23)

36 (36.73)

6.72

0.001

0.13

0.09

0.003

Light sensitivity

76 (18.18)

484 (23.29)

30 (30.61)

4.39

0.01

–

–

–

Noise sensitivity

70 (16.75)

480 (23.10)

32 (32.65)

7.12

0.001

0.01

0.07

0.002

Irritability

46 (11.00)

264 (12.70)

16 (16.33)

1.11

0.33

–

–

–

Sadness

30 (7.18)

178 (8.57)

14 (14.29)

2.57

0.08

–

–

–

Nervousness

8 (1.91)

104 (5.00)

8 (8.16)

5.23

0.01

–

–

–

More emotional

18 (4.31)

150 (7.21)

10 (10.20)

3.20

0.04

–

–

–

Numbness

22 (5.26)

82 (3.95)

6 (6.12)

1.19

0.31

–

–

–

Slowed down

52 (12.44)

448 (21.56)

38 (38.78)

19.14

< 0.001

< 0.001

< 0.001

< 0.001

Mentally foggy

40 (9.57)

384 (18.48)

36 (36.73)

22.43

< 0.001

< 0.001

< 0.001

< 0.001

Concentration

66 (15.79)

572 (27.53)

36 (36.73)

15.69

< 0.001

< 0.001

0.10

< 0.001

Memory problems

28 (6.70)

360 (17.32)

24 (24.49)

17.75

< 0.001

< 0.001

0.14

< 0.001

Vision problems

38 (9.09)

246 (11.84)

20 (20.40)

5.00

0.01

–

–

–