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Results of the multivariate logistic regression analysis of prematurity and asthma after stratification by atopy (defined as ≥1 positive allergen-specific IgE). Multivariate models were adjusted for age, sex, household income, maternal history of asthma, and early-life exposure to ETS. Goodness of fit for each of the multivariate models was assessed by using the Hosmer-Lemeshow test (P = .9 for the model in nonatopic children and P = .9 for the model in atopic children).
