Study design
National Heart, Lung and Blood Institute defines asthma as a chronic, lung disease that causes wheezing, chest tightness, coughing and shortness of breath (NIH, 2014). People who have asthma, have inflamed airways (NIH, 2014). It is a condition that has no cure but can be controlled through treatment (NIH, 2014). NIH points out several factors that can trigger or aggravate the symptoms of asthma. These symptoms include allergies (dust, animal hair, cockroaches, mold or pollen); pollution caused by several types of fumes or chemical elements; some types of medication; infections or physical activity.
The present study aims to assess whether the adult body mass index (BMI) influences the risk of asthma. The study model …show more content…
Through this calculation, it is possible to ascertain the RR (Gordis, 2014) of asthma in individuals with high BMI in comparison to the risk for individuals with low BMI. The RR results can be divided into three different categories. RR with a result equal to 1 indicates that there is no increased risk in case of association with the factor under study (Gordis, 2014). RR greater than 1 indicates positive association and RR less than 1 would indicate protective effect (Gordis, …show more content…
Since the 1990s, studies have shown an increase in the BMI of the world population and have been trying to corroborate these data with the prevalence of asthma, since high BMI indices interfere with respiratory mechanics (Pelegrino, Faganello, Fugueirôa, Padovani & Godoy,?). Sedentary lifestyle, possible limitations for physical exercise, gastroesophageal reflux, and inflammatory alterations are some of the high prevalence characteristics of obese individuals that may be associated with asthma (Pelegrino, Faganello, Fugueirôa, Padovani & Godoy,?). However, results of studies available are still not enough to prove this relationship and Pelegrino, Faganello, Fugueirôa, Padovani & Godoy (?) point out that the relationship between asthma and obesity is controversial according to studies. Some results indicate that the association between BMI and asthma has a higher incidence among women, while others show that obesity is a risk factor for the development of asthma in both men and women (Pelegrino, Faganello, Fugueirôa, Padovani & Godoy,?). A different article, published by Hjellvik, Tverdar & Furu (2010) also discusses the differences in the results of studies already published in this area. According to the previously cited article, the authors also