Lifetime prevalence of migraine and other headaches lasting 4 or more hours: the Atherosclerosis Risk in Communities (ARIC) study.

Objectives: To evaluate the lifetime prevalence of migraine and other headaches lasting 4 or more hours in a population-based study of older adults.

Background: Migraine and other headaches not fulfilling migraine criteria are common afflictions. Yet the health and social effects of these conditions have not been fully appreciated, particularly among older adults.