From: Does analgesic overuse matter? Response to OnabotulinumtoxinA in patients with chronic migraine with or without medication overuse
All patients (N = 434)
MO (N = 219)
WMO (N = 215)
Female (N)
Age
358
44.9 (18–91)
187
45.8 (18–91)
171
44 (18–77)
Male (N)
76
47.5 (19–77)
32
49.7 (18–74)
44
45.8 (23–77)
Age of onset of migraine
17
19
Duration of CM (years)
7.4
(0.5–67)
6
8