From: Does analgesic overuse matter? Response to OnabotulinumtoxinA in patients with chronic migraine with or without medication overuse
Outcome
Patients (N)
Before treatment
Mean (SD)
After treatment
Change
Mean (95 % CI)
P value
HIT6 score
178
68.2 (5.1)
61.4 (17.8)
−6.8 (−8.0, −5.6)
<0.001