[Olfactory alterations in allergic rhinitis to pollens and mites].
BACKGROUND
In the last 80 years, the presence of allergies has increased among Europeans from 0.28% to 14.2%. Allergic rhinitis is the main presentation, rising from 18% to 40% of cases. The aim of this study is to demonstrate that allergic rhinitis due to pollen and mites has an effect on the olfactory system.


METHODS
We describe the impairment of olfactory function in two groups of individuals with allergic rhinitis due to mites or pollen (n = 76; 42 with allergy to pollen [48.9%], and 34 with allergy to mites [39%]), compared with a group of healthy volunteers (n = 120). Olfactory ability was measured by the BAST-24 (Barcelona Smell Test) olfactometer comprising 20 odours tested by the forced choice method to compare the levels of odour detection (knowing if there is odour in the environment), and efficacy (identifying what was smelt).


RESULTS
The results show firstly that people with allergic rhinitis have a clear, definitive, and significant impairment (P >.05) in olfactory levels; secondly, there is a tendency towards greater olfactory loss in the case of people with pollen-related allergic rhinitis than in those allergic to mites; and thirdly, the different odours are affected differently in the 2 groups.


CONCLUSIONS
We propose consideration of the study of olfactory status in the assessment of patients with allergic rhinitis.
de Haro
Josep
J
Servicio de Otorrinolaringología, Hospital Municipal de Badalona, Badalona, Barcelona, España. 15583jhl@comb.es
Benítez
P
P
Alobid
I
I
González
J A
JA
Pascual
B
B
Mullol
J
J
D000328:Adult; D000818:Animals; D005260:Female; D006801:Humans; D008297:Male; D008925:Mites / Q000276:immunology*; D000857:Olfaction Disorders / Q000175:diagnosis / Q000453:epidemiology*; D011058:Pollen / Q000276:immunology*; D015995:Prevalence; D012221:Rhinitis, Allergic, Perennial / Q000175:diagnosis / Q000453:epidemiology* / Q000276:immunology*