Temporal trends in the prevalence of asthma and rhinoconjunctivitis in adolescents

To analyze the temporal trend of asthma and rhinoconjunctivitis prevalences as well as their symptoms in adolescents. Two cross-sectional studies were conducted using the same methodology and questionnaire as was used for adolescents aged 12 to 14 years in the Brazilian city of Florianopolis, SC, So...

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Published in:	Revista de saúde pública 2015-01, Vol.49
Main Authors:	Wilmer, Fernanda Agapito Pássaro, Maurici, Rosemeri, Nazário, Carlos Alberto Kuntz, Nazário, Kahio César Kuntz, Pássaro, Paula Fernanda Agapito, Piazza, Helena Elisa, Bertoldi, Rennan Almir, Pizzichini, Emílio, Pizzichini, Márcia Margaret Menezes
Format:	Article
Language:	eng ; por
Subjects:	Adolescent Adolescente Asma, epidemiologia Asthma - diagnosis Asthma - epidemiology Brazil - epidemiology Child Conjunctivitis, Allergic - diagnosis Conjunctivitis, Allergic - epidemiology Cross-Sectional Studies Diagnostic Self Evaluation Estudos Transversais Female Humans Male Original Prevalence PUBLIC, ENVIRONMENTAL & OCCUPATIONAL HEALTH Rhinitis, Allergic - diagnosis Rhinitis, Allergic - epidemiology Rinite, epidemiologia Schools - statistics & numerical data Sex Factors SOCIOLOGY Surveys and Questionnaires
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Summary:	To analyze the temporal trend of asthma and rhinoconjunctivitis prevalences as well as their symptoms in adolescents. Two cross-sectional studies were conducted using the same methodology and questionnaire as was used for adolescents aged 12 to 14 years in the Brazilian city of Florianopolis, SC, Southern Brazil. Based on the international protocol of the International Study of Asthma and Allergies in Childhood (ISAAC) study, adolescents were evaluated in 2001 and 3,150 in 2012. The schools included in this study were the same as in the 2001 study. These schools were randomly selected after stratification by network (public and private) and geographic location. The total average percentage variation was estimated for the prevalence of asthma and rhinoconjunctivitis and their symptoms. The prevalence of reported asthma was 10.9% in 2001 and 14.8% in 2012, with an average variation of 2.8% in the period. The highest average variation in the period was observed among female adolescents (4.1%). In parallel a significant increase occurred in reported physician-diagnosed asthma, 7.3% in 2001 and 11,1% in 2012, with an annual variation of 4.5%. The largest increases in reported physician-diagnosed asthma were seen in female (5.9%) and male (4.5%) public school pupils. In addition, a significant increase in reported rhinoconjunctivitis occurred, with the average variation in the period being 5.2%. Reports of severe asthma symptoms remained unchanged during the period, while the annual variation for reported current wheezing (-1.3%) and wheezing during exercise (-1.2%) decreased. The results showed a significant increase in the annual average variation for asthma and rhinoconjunctivitis prevalence during the 2001 to 2012 period.
ISSN:	0034-8910 1518-8787 1518-8787