Table 1 Demographics and clinical characteristics of total cohort and study population.
Total population n = 246 | Study population n = 158 | |
|---|---|---|
Sex: boy n (%) | 154 (63) | 102 (65) |
Age at start mean, SD (range) | 11, 2.8 (5–17) | 11, 2.7 (5–16) |
Allergen treatment n (%) | ||
Birch | 174 (71) | 122 (77) |
Grass | 47 (19) | 12 (8) |
Both grass and birch | 24 (10) | 24 (15) |
SYMPTOMS at start n (%) | ||
Rhinoconjunctivitis | 68 (28) | 41 (26) |
Asthma and rhinoconjunctivitis | 176 (71) | 117 (74) |