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A dataset constructed from NHANES III.
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A data frame with 4519 observations on the following 10 variables.
COPtreatment, 1 if cotinine level is between 0.563-14.9 ng/ml and 0 otherwise
DMARETHN1 if white, 0 if others
DMPPIRPoverty income ratio
HFE11 if the house is built before 1974, 0 if after 1974
HFE2number of rooms in the house
HFHEDUCReducation level of the reference adult
HSAGEIRage at the time of interview
HSFSIZERsize of the family
HSSEX1 if male, 0 if female
PBPblood lead level
We follow Mannino rt al. (2003) in constructing a dataset that includes children aged 4-16 years old for whom both serum cotinine levels and blood lead levels were measured in the Third National Health and Nutrition Examination Survey (NHANES III), along with the following variables: race/ethnicity, age, sex, poverty income ratio, education level of the reference adult, family size, number of rooms in the house, and year the house was constructed. The biomarker cotinine is a metabolite of nicotine and an indicator of second-hand smoke exposure. Treatment status is 1 if cotinine level is between 0.563-14.9 ng/ml and 0 otherwise. All continuous/ordinal variables are standardized by subtracting the mean and divided by 2 standard deviations so that they are more comparable to binary covariates (Gelman 2008).
NHANES III, the Third US National Health and Nutrition Examination Survey.
D. M. Mannino, R. Albalak, S. D. Grosse, and J. Repace. Second-hand smoke exposureand blood lead levels in U.S. children.Epidemiology, 14:719-727, 2003
A. Gelman. Scaling regression inputs by dividing by two standard deviations.Statisticsin Medicine, 27:2865-2873, 2008.
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