Description Usage Format Source Examples
The protein
data frame has longitudinal data on protein intake, body mass index and age of subjects in a dietary study.
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This data frame contains the following columns:
idnum
identification number unique to each subject.
proteinBioM
logarithm of intake of protein as measured by the biomarker urinary.
age
age of subject in years.
BMI
body mass index.
proteinRecall
logarithm of intake of protein as measured by a 24-hour recall instrument.
female
indicator that subject is female:
1=subject is female,
0=subject is male.
Kipnis, V., Subar, A.F., Midthune, D., Freedman, L.S., Ballard-Barbash, R., Troiano, R., Bingham, S., Schoeller, D.A., Schatzkin, A. and Carroll, R.J. (2003). The structure of dietary measurement error: results of the OPEN biomarker study. American Journal of Epidemiology, 158, 14-21.
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