Table 5:

Odds ratio for the relationship between intervention, visits and asthma symptoms in the LEIP Study.

	Night wheeze or cough		Daytime Wheeze		Daytime Cough		Total Symptom Score
	OR (95% CI)	P	OR (95% CI)	P	OR (95% CI)	P	OR (95% CI)	P
Visit	− a	-	0.65 (0.29, 1.47)	0.30	1.12 (0.67, 1.87)	0.64	0.69 (0.34, 1.39)	0.30
Intervention	− a	-	2.05 (0.69, 6.04)	0.20	2.48 (0.94, 6.57)	0.07	1.75 (0.58, 5.22)	0.32
Air Endotoxin Reduction	0.72 (0.20, 2.50)	0.61	1.57 (0.48, 5.18)	0.46	1.12 (0.32, 3.88)	0.86	0.84 (0.19, 3.75)	0.82
Endotoxin Load Reduction
Overall	0.62 (0.42, 0.91)	0.014	0.58 (0.37, 0.92)	0.02	0.62 (0.40, 0.95)	0.03	0.52 (0.29, 0.92)	0.02
CBB	0.20 (0.03, 1.18)	0.22	0.13 (0.04, 0.46)	0.002	0.26 (0.11, 0.71)	0.002	0.14 (0.04, 0.46)	0.001
CBF	0.29 (0.09, 0.92)	0.036	0.45 (0.19, 1.06)	0.07	0.23 (0.10, 0.57)	0.001	0.15 (0.05, 0.48)	0.001
PAF	0.51 (0.26, 1.01)	0.053	0.60 (0.26, 1.38)	0.23	0.74 (0.43, 1.26)	0.27	0.59 (0.30, 1.15)	0.12
KNF	1.72 (0.59, 4.99)	0.32	1.25 (0.35, 4.46)	0.73	1.29 (0.49, 3.35)	0.61	1.16 (0.43, 3.15)	0.77

Models adjusted for age and gender of the participants, season of sampling, place sampled in the home, location of the house (farm, non-farm), family income, smoking in the house, presence of central air conditioning, presence of pets in the house, and main heat source.

^aInteraction term for Intervention-by-visit was significant (P=0.049).

Bold indicates significant associations with the asthma symptoms (p-value < 0.05)