Example Table. Prevalence of Current Asthma and Diagnosed Hay Fever by Average Alternaria alternata Antigen Level in the Household
| Categorized Alternaria Level* | Current Asthma | Diagnosed Hay Fever |
| N | Prevalence† (95% Cl) | N | Prevalence† (95% Cl) |
| 1st tertile | 40 | 4.8 (3.3-6.9) | 93 | 16.4 (13.0-20.5) |
| 2nd tertile | 61 | 7.5 (5.2-10.6) | 122 | 17.1 (12.8-22.5) |
| 3rd tertile | 73 | 8.7 (6.7-11.3) | 93 | 15.2 (12.1-18.9) |
1st tertile <3.90 μg/g; 2nd tertile 3.90-6.27 μg/g; 3rd tertile ≥6.28 μg/g.
Percentage (95%Cl) weighted for the multistage sampling design of the National Survey of Lead and Allergens in Housing.
Table adapted from Salo et al. [152].