pops.Rd

% Generated by roxygen2: do not edit by hand
% Please edit documentation in R/pops.R
\docType{data}
\name{pops}
\alias{pops}
\alias{pops.pred}
\title{Project on preterm and small for gestational age infants (POPS)}
\format{
\code{pops} is a data frame with 959 rows and 86 columns.
\code{pops.pred} is the 86 by 86 binary predictor matrix used for specifying
the multiple imputation model.
}
\source{
Hille, E. T. M., Elbertse, L., Bennebroek Gravenhorst, J., Brand, R.,
Verloove-Vanhorick, S. P. (2005).  Nonresponse bias in a follow-up study of
19-year-old adolescents born as preterm infants. Pediatrics, 116(5):662666.

Hille, E. T. M., Weisglas-Kuperus, N., Van Goudoever, J. B., Jacobusse, G.
W., Ens-Dokkum, M. H., De Groot, L., Wit, J. M., Geven, W. B., Kok, J. H., De
Kleine, M. J. K., Kollee, L. A. A., Mulder, A. L. M., Van Straaten, H. L. M.,
De Vries, L. S., Van Weissenbruch, M. M., Verloove-Vanhorick, S. P. (2007).
Functional outcomes and participation in young adulthood for very preterm and
very low birth weight infants: The Dutch project on preterm and small for
gestational age infants at 19 years of age. Pediatrics, 120(3):587595.

Van Buuren, S. (2018).
\href{https://stefvanbuuren.name/fimd/sec-selective.html#pops-study-19-years-follow-up}{\emph{Flexible Imputation of Missing Data. Second Edition.}}
Chapman & Hall/CRC. Boca Raton, FL.
}
\description{
Subset of data from the POPS study, a national, prospective study on preterm
children, including all liveborn infants <32 weeks gestational age and/or <1500
g from 1983 (n = 1338).
}
\details{
The data set concerns of subset of 959 children that survived up to the age
of 19 years.

Hille et al (2005) divided the 959 survivors into three groups: Full
responders (examined at an outpatient clinic and completed the
questionnaires, n = 596), postal responders (only completed the mailed
questionnaires, n = 109), non-responders (did not respond to any of the
mailed requests or telephone calls, or could not be traced, n = 254).

Compared to the postal and non-responders, the full response group consists
of more girls, contains more Dutch children, has higher educational and
social economic levels and has fewer handicaps. The responders form a highly
selective subgroup in the total cohort.

Multiple imputation of this data set has been described in Hille et al (2007)
and Van Buuren (2012), chapter 8.
}
\note{
This dataset is not part of \code{mice}.
}
\examples{
pops <- data(pops)
}
\keyword{datasets}