In North America, the burden of headache is well-documented in the United States but not elsewhere. A population-based study is planned in Mexico.

Published burden-of-headache data in Central America are of questionable quality. At least one new study is needed. A population-based study is in the pilot phase in Guatemala.

In South America, Brazil is a priority country because of its size, and it is moderately well-resourced. Good prevalence but not burden data exist. From other countries in South America, the quality of data is not high. New studies are planned in Peru and Brazil, and may be extended to Argentina and Colombia.

Collaborators:

• SW Broner, The Headache Institute, Columbia Presbyterian Hospital, New York, NY, USA
• LP Queiroz, Universidade Federal de Santa Catarina, Florianopólis, SC, Brazil
• G Quispe, University of Lima, Lima, Peru
• HB Stokes, Universidad San Carlos de Guatemala, Guatemala City, Guatemala