From: Post-traumatic headache after mild traumatic brain injury in a one-year follow up study – risk factors and return to work
Factor
Odds ratio
95% Cl
P value
n = 127
Headache at the ED
5.42
1.19-24.73
0.029
Other pain after injury
3.20
1.31-7.78
0.010
Insomnia after injury
3.23
1.33-7.89
Vertigo after injury
5.99
2.33-15.40
<0.001