Subset of growth data from the collaborative perinatal project (CPP) at
single time-point. The rows in original cpp
data were subset for
agedays==366. See ?cpp
for the description of the variables.
data(cpp_1yr)
https://catalog.archives.gov/id/606622
Broman, Sarah. 'The collaborative perinatal project: an overview.' Handbook of longitudinal research 1 (1984): 185-227.
data(cpp_1yr) head(cpp_1yr)#> subjid agedays wtkg htcm lencm bmi waz haz whz baz siteid sexn #> 3 1 366 14.5 79 79 23.23346 3.84 1.35 4.02 3.89 5 1 #> 6 2 366 8.4 73 73 15.76281 -1.27 -1.17 -0.96 -0.80 5 1 #> 14 7 366 12.6 79 79 20.18907 2.46 1.35 2.38 2.21 5 1 #> sex feedingn feeding gagebrth birthwt birthlen apgar1 #> 3 Male 90 Unknown 287 4621 55 8 #> 6 Male 90 Unknown 280 3345 51 8 #> 14 Male 90 Unknown 287 3260 53 6 #> apgar5 mage mracen mrace mmaritn mmarit meducyrs sesn ses parity #> 3 9 21 5 White 1 Married 12 50 Middle 1 #> 6 9 15 5 White 1 Married NA NA . 0 #> 14 7 19 5 White 1 Married 12 75 Upper 0 #> gravida smoked mcignum comprisk #> 3 1 0 0 none #> 6 0 1 35 none #> 14 0 0 0 none #> [ reached getOption("max.print") -- omitted 3 rows ]table(cpp_1yr[["agedays"]])#> #> 366 #> 428