Prevalence of Asthma among Norwegian Elite Athletes

Table 2

Prevalence of medically diagnosed asthma, bronchial hyperresponsiveness (BHR), and allergy defined as one or more positive skin prick tests (SPT) among elite athletes, divided into summer and winter athletes and across sport categories.

	Summer (n = 80)	Winter (n = 55)	value	Endurance (n = 64)	Team sport (n = 50)	Technical (n = 21)	value
Asthma N (%)	16 (20)	27 (50)	<0.001	33 (52)	3 (6)	7 (33)	<0.001
^#BHR N (%)	23 (29)	29 (53)	0.005	34 (53)	9 (18)	9 (43)	0.041
Allergy N (%)	27 (35)	25 (47)	0.166	26 (41)	16 (33)	10 (50)	0.403

BHR is defined as PD_20met ≤8 μmol. PD_20met: provocation dose of methacholine causing 20% reduction in forced expiratory volume in the first second of expiration. ^#: for doctor-diagnosed asthma, 54 winter athletes and 63 endurance athletes are included; : for allergy assessment, 77 summer athletes, 53 winter athletes, 62 endurance athletes, 48 team sport athletes, and 20 technical sport athletes are included.