Effective control of asthma with age, prophylaxis and phenotypes In our study, in addition to studying the effects of medications in phenotypes, we also looked at the age of the children, including children under age 2 and children aged 2 to 5 years. Table 3.23 The results in Table 3.23 show: - In non allergic asthma group, the prevalence of patients under 2 years of age who are controlled: 72.2%, who are partly controlled and uncontrolled: 27.8% after 6 months of treatment with Singuliar and Flixotide.