Birch + 5-grass Birch + placebo 5-grass + placebo
n 23 25 26
Female 11 (49%) 12 (48%) 12 (46%)
Mean age at study start 38.1 ± 10.2 36.8 ± 10.0 34.8 ± 9.9
Min/max age at study start 19.3/53.3 21.0/53.4 19.5/51.4
Other sensitizations * 2.6 ± 1.1 1.8 ± 1.3 2.7 ± 0.9
FEV1% 90.5 ± 10.0 97.3 ± 9.7 91.8 ± 7.6
FENO ppb 24.5 ± 27.0 22.2 ± 17.8 22.6 ± 15.7