Burden of asthma among inner-city children from Southern Brazil

To assess the impact of asthma in a population of inner-city Brazilian children.

In a cross-sectional study, we selected children with asthma and healthy controls from public schools (8-16 years) from a capital city of Southern Brazil. Divided into three phases, questionnaires were administered, assessing lung function, body mass index and allergic sensitization.

From 2500 children initially included in the study (48.4% males; mean age of 11.42 ± 2.32 years), asthma prevalence was detected in 28.6% (715/2500). The disease was not controlled in 42.7% (305/715) of the children, with 7.6% of hospitalization rate. School absenteeism (at least one day of missing school because of asthma) and sedentary behavior were high (57.1 and 67.2%, respectively), with 47.9% of subjects requiring oral steroids in the previous year, and physical well-being significantly lower than controls, directly interfering with quality of life, and therefore in the daily activities of these students. Moreover, 38% of the parents admitted to being non-adherent to treatment with their children and 31.1 and 53.6%, respectively, believed that rescue medication and exercise might be harmful.

The burden of asthma in Brazilian children seems to be substantial. New international guidelines with a special focus in developing countries settings, with more pragmatic approaches, should be a priority for discussion and implementation actions.