TABLE III.

Odds ratios (95% CI) for bivariate associations between elevated levels of allergens and endotoxin^*

	Alternaria OR (95% CI)	Bla g 1 OR (95% CI)	Can f 1 OR (95% CI)	Der f 1 OR (95% CI)	Der p 1 OR (95% CI)	Fel d 1 OR (95% CI)	MUP OR (95% CI)	Endotoxin OR (95% CI)
Alternaria	NA	1.40 (0.78, 2.51)	1.63 (1.07, 2.50)	1.79 (1.17, 2.72)	2.87 (1.72, 4.79)	1.79 (1.25, 2.56)	2.54 (1.57, 4.10)	2.21 (1.56, 3.14)
Bla g 1		NA	0.56 (0.32, 0.97)	0.47 (0.27, 0.83)	1.73 (1.03, 2.91)	0.42 (0.25, 0.71)	3.00 (1.85, 4.87)	2.44 (1.49, 3.98)
Can f 1			NA	0.75 (0.56, 1.01)	1.26 (0.85, 1.87)	2.01 (1.39, 2.90)	0.95 (0.70, 1.27)	1.24 (0.80,1.91)
Der f 1				NA	1.81 (1.18, 2.77)	0.93 (0.71, 1.21)	0.99 (0.65, 1.52)	1.00 (0.79, 1.27)
Der p 1					NA	1.53 (1.10, 2.13)	1.38 (0.93, 2.05)	1.43 (0.88, 2.33)
Fel d 1						NA	1.09 (0.75, 1.57)	1.26 (0.92, 1.72)
MUP							NA	1.65 (1.17, 2.32)
Endotoxin								NA

^*The unadjusted odds ratios are calculated using dichotomous allergen/endotoxin levels (elevated level: yes vs. no). Cut points for elevated allergen levels: 10 μg/g for Der f 1, Derp 1, and Can f 1; 8 μg/g for Fel d 1; 8 U/g Bla g 1; 1.6 μg/g for MUP; and 7 μg/g for Alternaria; for endotoxin the cut-off value was 107 EU/mg (75th percentile of the average endotoxin concentration in the household)

^†Statistically significant associations (P<0.05) are shown in bold

^‡NA, not applicable