The Phenobarb data frame has 744 rows and 7 columns.
This data frame contains the following columns:
an ordered factor identifying the infant.
a numeric vector giving the birth weight of the infant (kg).
an ordered factor giving the 5-minute Apgar score for the infant. This is an indication of health of the newborn infant.
a factor indicating whether the 5-minute Apgar score is < 5
or >= 5.
a numeric vector giving the time when the sample is drawn or drug administered (hr).
a numeric vector giving the dose of drug administered (\(u\)g/kg).
a numeric vector giving the phenobarbital concentration in the serum (\(u\)g/L).
Data from a pharmacokinetics study of phenobarbital in neonatal infants. During the first few days of life the infants receive multiple doses of phenobarbital for prevention of seizures. At irregular intervals blood samples are drawn and serum phenobarbital concentrations are determined. The data were originally given in Grasela and Donn(1985) and are analyzed in Boeckmann, Sheiner and Beal (1994), in Davidian and Giltinan (1995), and in Littell et al. (1996).