Risk factors for ER visits due to asthma exacerbations in patients enrolled in a program for the control of asthma and allergie rhinitis in Feira de Santana, Brazil.

Objective: To determine the risk factors for ER visits due to asthma exacerbations in patients monitored at a referral center.

Methods: Prospective cohort study of 253 outpatients (children and adults) with asthma who were monitored for 12 months at the Referral Center of the Program for the Control of Asthma and Allergic Rhinitis in the city of Feira de Santana, Brazil.

Results: Exacerbations were common, and 36.