The mean age of asthma diagnosis was significantly younger for individuals with the wildtype (WT) TIRAP allele (22.4 years) compared to those who are carriers for this allele (26.1 years; p = 0.008) indicating that the onset of asthma may be delayed in individuals with at least one copy of the minor TIRAP allele of rs8177374. Here, TIRAP is linked to asthma.