Table 1.
Characteristics of the study patients.
| Active (n = 19) | Placebo (n = 17) | p value | |
|---|---|---|---|
| Age (yrs) | 27.5.±6.8 | 25.3 ± 8.3 | 0.48 |
| Female (%) | 11 (58) | 12 (70) | 0.07 |
| Duration of rhinitis (yrs) | 3.9 ± 1.7 | 4.1 ± 2.2 | 0.32 |
| Urban (%) | 13 (68) | 11 (64) | 0.82 |
| Mean symptom score in the basement during the birch pollen season | 3.81 ± 1.29 | 3.29 ± 1.51 | 0.49 |
| Number of patients with the presence of cough and other asthmatic symptoms during birch pollen season (%) | 12 (63) | 9 (53) | 0.52 |
| (i) Cough | 12 (63) | 9 (53) | |
| (ii) Wheezing | 9 (47) | 7 (41) | |
| (iii) Dyspnea | 6 (32) | 7 (41) | |
| (iv) Shortness of breath | 8 (42) | 5 (29) | |
| (v) Chest tightness | 5 (47) | 6 (35) | |
| A positive result of bronchial reversibility test (%) | 4 (21) | 3 (18) | 0.29 |
| Specific nasal IgE to birch pollen in nasal lavage (kU/L) after NPT | 2.17 ± 0.82 | 1.92 ± 0.68 | 0.43 |
NPT: nasal provocation test.