From: Prospective analysis of the use of OnabotulinumtoxinA (BOTOX) in the treatment of chronic migraine; real-life data in 254 patients from Hull, UK
Outcome
n
Before treatment mean (SD)
After treatment mean (SD)
Change mean (95% CI)
p-value
HIT6 score
177
68.9 (4.3)
59.2 (8.2)
-9.7 (-11.0, -8.4)
<0.001