Table I. Characteristics of patients.
| Schedule A | Schedule B | Schedule C | Controls | |
| Patients: | 22 | 21 | 21 | 22 |
| Sex (M/F) | 14/8 | 12/9 | 12/9 | 12/10 |
| Mean age (yrs) ± SD | 26.3 ± 11.1 | 20.9 ± 8.8 | 27.9 ± 13.5 | 25.3 ± 10.8 |
| Allergens SLIT: | ||||
| Parietaria pollen | 4 | 3 | 2 | 2 |
| Dermatophagoides | 8 | 8 | 7 | 9 |
| Grass pollen | 6 | 7 | 9 | 8 |
| Birch pollen | 4 | 3 | 3 | 3 |
SD: standard deviation