Table 2.

Univariate models predicting endotoxin concentration from the living room floor

Model	Variable	Coefficient (95% CI)	P-value
1*	1 pet in home	0.21 (−0.00, 0.43)	0.055
	≥ 2 pets in home	0.44 (0.19, 0.69)	0.001
2*	1 dog in home	0.18 (−0.04, 0.41)	0.105
	≥ 2 dogs in home	0.61 (0.24, 0.99)	0.001
3*	1 cat in home	0.57 (0.27, 0.87)	0.001
	≥ 2 cats in home	0.18 (−0.17, 0.53)	0.318
4	Urban home	0.27 (0.10, 0.44)	0.002
5	Occupant density	0.44 (0.19, 0.69)	0.001
6	Cleanliness of home	−0.34 (−0.43, −0.25)	0.001
7	Mother smokes in home	0.45 (0.18, 0.73)	0.001
8	Evidence of vermin in home	0.92 (0.23, 1.61)	0.009
9	Ln (Can f 1)	0.06 (0.02, 0.09)	0.003
10	Ln (Fel d 1)	0.07 (0.03, 0.10)	0.001

^*The comparison group for pets, cats or dogs is all homes with no pets in the home. There were 35 homes (33 with dogs and 4 with cats) where the pet was kept outdoors at all times and these homes were excluded from analysis.