A door-to-door survey of transient ischemic attack (TIA) and stroke wa
s conducted in 3 towns of the Alcoi health area. The prevalence ratios
found for TIA and stroke were 13/1,000 people (95% CI 8.8-17.9) and 2
1.5/1,000 (95% CI 15.8-27.2), respectively. The crude incidence rates
for both TIA and stroke were 2.8/1,000 (95% CI 0.7-4.9). Methodologica
l differences in the ascertainment of the cases may explain the variat
ions in the rates between the present work and other studies in the li
terature.