Prevalence of Allergic Rhinitis in 13-14 Year Old School Children in Hamedan|
Safari, Mojgan & Jari, Mohsen
Allergic Rhinitis (AR) is an inflammatory disorder of the nasal mucosa characterized
by nasal congestion, rhinorrhea and itching and often accompanied by sneezing and conjunctival
irritation. Two prerequisites for the expression of AR are sensitivity to an allergen and its presence
in the environment. Recognition of allergens and removal and avoidance of them can decrease the
prevalence of AR. This study aims to evaluate the prevalence of AR in Hamedan, Iran, and
recognition of effective factors involved in expression of AR.
The study was undertaken between October 2005 and June 2006 among 13- to 14-yearold
children in middle-schools of Hamedan. Data were collected using the standardized ISAAC
written questionnaire for prevalence of AR and another questionnaire for effective factors on AR
including gender, season of expression of AR, smoking parents, keeping pets and birds, apartment
plants, breast milking and family size. In the second phase the students with AR were examined
for signs of AR.
A total of 1600 (900 girls and 700 boys) children participated in the study. 17.7% of the
children had symptoms of allergic rhinitis sometime in their life. There was no significant
difference between prevalence of AR between boys and girls (18.6% in the boys and 17% in the
girls) (P>0.05). 37.2% of the cases were perennial and 62.8% of them were seasonal or mixed
type. AR was more prevalent in spring (21%). The prevalence of the disease between students
with smoking parents and non smoking parents were 30.6% and 11.2% respectively (P<0.001).
The prevalence of the disease between students with pets and without pets were 23.1% and 17.7%
respectively (P=0.001). Presence of apartment plants, type of nutrition and family size had no
effect on prevalence of AR (P>0.05). The most common signs of AR were allergic shiners (54%)
and clear and dilute nasal secretion (51%).
Compared with previous studies conducted in other Iranian cities using similar
method, the prevalence of allergic rhinitis was lower in Hamedan. The prevalence of AR may be
reduced with avoidance of smoking and removal of pets.
Allergic Rhinitis; ISAAC; Allergic shiners; Allergen