Table 3.

Diary recorded during birch pollen season (median, upper and lower quartiles).

	Allergic rhinitis	Allergic asthma	p-value
Symptom score
Nose and eyes	2.4 (1.1, 3.9)	3.8 (1.9, 4.9)	0.37
Respiratory	1.3 (0, 4.2)	1.3 (0.4, 2.0)	0.83
Total	3.8 (2.4, 6.7)	4.2 (3.0, 6.9)	0.67
Medication score
Oral anti-histamine	1 (1, 1)	1 (0, 1.1)	0.67
Topical *	1.75 (0.25, 2)	0.9 (0, 2.6)	0.83
Beta-2-agonists	0 (0, 0)	0.6 (0.2, 1.9)	0.006*
Total	3 (1.2, 3.5)	2.7 (0.5, 5.6)	0.79
Lung function
Morning PEFR (L/min)	575 (550, 620)	475 (433, 551)	0.020
Evening PEFR (L/min)	610 (555, 630)	478 (449, 551)	0.005
ΔFEV1 **	-0.07 (-0.37, 0.2)	-0.21 (-0.43, -0.16))	0.26

* Topical medication: anti-histamines and/or cromones

** Change in FEV₁ in % compared with before-season spirometry