Asthma and Allergic Rhinitis in the Same Patients

Abstract
In a Danish general practice study, figures are given about the simultaneous prevalence of asthma and allergic rhinitis and the order of onset among 7662 patients, who, during 1 yr, consulted for 1 or both of these diseases. Of patients with asthma, 28% consulted because they also had allergic rhinitis; 17% of patients with allergic rhinitis consulted because they also had asthma. Age- and sex-distributions are presented. In 25% of patients with both diseases, the onset of both diseases occurred within the same year, while in 35% the onset of asthma occurred first and in 40% allergic rhinitis. Among patients with both diseases, who did not have onset of both within the same year, more than 75% of them had onset of 1 disease within 2 yr of the other.