The American Migraine Prevalence and Prevention (AMPP) study was started in 2004, and involved posting questionnaires to 120,000 households in the US.[Silberstein et al., 2007; AMF website] The questionnaire included questions about headache frequency, severity, medication use, and impact on daily functioning.[Silberstein et al., 2007; AMF website] During a second phase of the study, 24,000 of the respondents who reported ‘severe’ headache were contacted for a follow-up, more detailed survey.[AMF website]
The results of the AMPP study showed that migraine is a frequent and under-recognised condition in the US.[Silberstein et al., 2007] At the time the study was conducted, there were many barriers to treatment, and many patients with migraine did not receive what was perceived to be adequate treatment.[Silberstein et al., 2007] The AMPP study estimated a prevalence of chronic migraine of 0.24–1.89%, depending on age group and sex, with a crude prevalence of 0.91% in the total sample.[Buse et al., 2012] Prevalence rates were highest among females, and appeared to decrease with increasing household income.[Buse et al., 2012] Among females with migraine, 7.45% had chronic migraine, and among males with migraine, 8.47% had chronic migraine.[Buse et al., 2012]
References:
American Migraine Foundation website. https://americanmigrainefoundation.org/resource-library/ampp/. Accessed July 2020.
Other references used on slide:
Bigal ME, Lipton RB. The prognosis of migraine. Curr Opin Neurol 2008; 21 (3): 301–308.
Bigal ME, Lipton RB. Migraine chronification. Curr Neurol Neurosci Rep 2011; 11 (2): 139–148.
ICD-10. https://www.icd10data.com/ICD10CM/Codes. Accessed Jun 2020.