Table 2 Laboratory animal allergens in mattress dust.

	Animal workers	Controls	p Value
Collected dust (g, median, range)	0.5 (0.2–1.5)	0.9 (0.3–2.0)	0.033
Total collected RUA (ng eq)	18.9 (9.6 to 37.2)	5.9 (3.8 to 9.2)	0.008
RUA/g dust (ng eq/g)	39.3 (19.8 to 78.0)	7.6 (4.7 to 12.2)	<0.001
Total collected MUA (ng eq)	14.2 (5.3 to 37.7)	6.9 (3.2 to 14.7)	0.251
MUA/g dust (ng eq/g)	29.5 (11.7 to 74.6)	8.8 (4.6 to 16.8)	0.041
Total collected MUP8 (ng eq)	14.9 (5.8 to 38.3)	4.4 (1.4 to 14.1)	0.116
MUP8/g dust (ng eq/g)	30.9 (12.8 to 74.8)	5.6 (2.0 to 16.0)	0.019

MUA, mouse urinary allergen; MUP, mouse urinary protein; RUA, rat urinary allergen.

All values are expressed in nanograms of animal urinary protien equivalent per hour and allergen values are represented by their geometric means and 95% CIs, unless otherwise specified.

Comparison was carried out with Student's t test.