nh0506: Smoking and homocysteine levels in NHANES 2005-2006.
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Description Usage Format Details Source References Examples

This is an example data set for makeblocks. For analysis of this data see Pimentel et al. (2016), Rosenbaum (2018).

1	data("nh0506")

A data frame with 2475 observations on the following 19 variables.

SEQN: NHANES id number
female: 1 if female, 0 if male
age: age in years, >=20
black: 1 if black, 0 otherwise
hispanic: 1 if hispanic, 0 otherwise
education: Education
povertyr: Ratio of family income to the poverty level, capped at 5x
creactiveprotein: creactive protein
homocysteine: homocysteine
cotinine: cotinine in blood
cadmium: cadmium in blood
lead: lead in blood
bmi: Body mass index
cigs100life: 1 if smoked more than 100 cigarettes in lifetime, 0 otherwise
smokenow: 1 if smokes now, 0 otherwise
cigsdays30: Days smoked in last 30 days: 0 if never smoker, 30 if daily smoker
cigsperday30: Cigarettes smoked per day in last 30 days
tobacco5days: 1 = used tobacco in the last 30 days, 0 otherwise
dailysmoker: 1 = daily smoker, 0 = never smoker

Data from NHANES 2005-2006 concerning homocysteine levels in daily smokers and never smokers, aged 20 and older. Daily smokers smoked every day for the last 30 days, smoking an average of at least 10 cigarettes per day. Never smokers smoked fewer than 100 cigarettes in their lives, do not smoke now, and had no tobacco use in the previous 5 days.

NHANES, the US National Health and Nutrition Examination Survey, 2005-2006.

Pimentel, S. D., Small, D. S. and Rosenbaum, P. R. (2016). Constructed second control groups and attenuation of unmeasured biases. Journal of the American Statistical Association, 111, 1157-1167.

Rosenbaum, P. R. (2018). Sensitivity analysis for stratified comparisons in an observational study of the effect of smoking on homocysteine levels. Annals of Applied Statistics, to appear.