Table 2. Environmental exposures (bedroom dust sample age 3 months).

	N	% detected	Range	Median	% >2	% > 8
Bla g 1 (U/g)	481	54.9	BD – 183	0.7	39.5	23.7
Mus m 1 (ng/g)	488	98.6	BD – 554,907	403.5	29.1	11.5
Der f 1 (ng/g)	486	68.9	BD – 129,571	181.0	19.1	9.9
Der p 1 (ng/g)	482	16.0	BD – 65839	BD	1.7	0.4
Fel d 1 (ng/g)	484	84.9	BD – 837,935	419.0	25.4	16.7
Can f 1 (ng/g)	481	71.3	BD – 424769	154.0	13.3	7.3
rFC (endotoxin)	443	100.0	0.12 – 2842	36.7	NA	NA
Ergosterol (ng/mg)	442	99.9	0.1 – 154	3.6	NA	NA

BD=Below detection

NA=Not applicable