FIGURE 2.

Acute headache medication days of use before and after treatment in patients ≥50 years of age (full analysis set): calculated as (A) total medication days^a and (B) any medication days^b. ^aTotal acute headache medication days are the sum of days when a patient took triptan, ergotamine, opioid, simple analgesic, or combination analgesic. If a patient used 2 classes of medication on the same day, they were counted twice. ^bAny acute headache medication days are defined as the number of days a patient used ≥1 class of medication. If a patient used 2 classes of medication on the same day, they were counted once. Missing data were not imputed