Home endotoxin exposure and wheeze in infants: correction for bias due to exposure measurement error.

(2001a) demonstrated that, after controlling for cockroach allergen, lower respiratory illness, smoking during pregnancy, lower birth weight, maternal asthma, presence of dog, and race/ethnicity, exposure to an elevated level of endotoxin in settled family-room house dust [≥100 endotoxin units (EU)/mg] during the first year of life is associated with a marginally significant increased risk of “any wheeze” [relative risk (RR) = 1.33; 95% confidence interval (CI), 1.00–1.76] and a significantly increased risk of “repeated wheeze” (RR = 1.56; 95% CI, 1.03–2.38).

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