Is Physician-Diagnosed Allergic Rhinitis a Risk Factor for the Development of Asthma?

L van den Nieuwenhof, T Schermer, Y Bosch. Allergy. 2010;65(8):1049–1055 To define the prospective risk of asthma in patients diagnosed with allergic rhinitis (AR) in a primary care population. The association between these 2 diseases has been shown previously in smaller groups and in cross-sectional studies. This study used a database that tracks >35 500 patients from 4 primary care practices in the Netherlands. The AR group consisted of all patients diagnosed with AR before the age of 50 ( n = 2279). The control group consisted of 2 people without AR …