Endotoxin as a determinant of asthma and wheeze among rural dwelling children and adolescents: A case–control study

Table 4 **Results from multiple logistic regression analyses* for case–control status with mattress endotoxin among the total population and by personal history of an allergic condition**

	Total population		Without a personal history of an allergic condition		With a personal history of an allergic condition
	n	OR (95% CI)	n	OR (95% CI)	n	OR (95% CI)
Mattress endotoxin concentration (EU/mg)
Among those aged ≤12 years	195	0.44 (0.20-0.98) ^†	132	0.20 (0.06-0.68) ^†	63	0.45 (0.16-1.29)
Among those aged >12 years	115	1.18 (0.42-3.31)	83	0.66 (0.11-3.67)	32	3.36 (0.53-21.23)
Mattress endotoxin load (EU/m²)
Among those aged ≤12 years	195	0.38 (0.20-0.75) ^†	132	0.22 (0.08-0.62) ^†	63	0.50 (0.20-1.28)
Among those aged >12 years	115	1.31 (0.47-3.68)	83	0.46 (0.09-2.42)	32	4.02 (0.99-16.41) ^‡

* Each model is fitted with one measure of endotoxin and is independent of the other models; Each model is adjusted for age group, sex, daycare attendance, presence of home air filter, smoking during pregnancy, smooth floors in the bedroom in the first year of life, season of testing, tobacco smoke exposure, and age group*endotoxin; Endotoxin levels were log transformed prior to analysis; OR = Odds ratio; CI = Confidence interval; EU = Endotoxin units.
^† p < 0.05; ^‡ p < 0.10.
p = 0.002.
p = 0.10.

ISSN: 1471-2466