3. In the personal study could be identified the unfavorable evolution of asthma risk
factors, evaluated for each step of severity and graded according to the level of influence:
impact factors (viral respiratory infections or microbial adherence to treatment) factors with
a medium impact (allergic rhinitis, obesity, cigarette smoke exposure and atopy family
environmental conditions) and low impact factors (sex, multisensitivity and age). The most
important environmental factors in the study group are air pollutants, allergen exposure,
parental smoking and socioeconomic conditions.
4. Factors related to the occurrence of asthma in childhood include atopy, sex,
genotype, prenatal factors, higher age at first episode of wheezing, asthma in one or both
parents and allergic rhinitis but also environmental factors like as allergen exposure,
smoking active and passive irritants and pollutants, diet and obesity and socioeconomic
factors.