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
182
68.1 (4.8)
59.7 (8.3)
−8.4 (−9.7, −7.1)
<0.001