lbreg (version 1.3)

Birth: Birth Weight Data

Description

Data used by Wacholder (1986) to illustrate the use of log binomial regression for estimating adjusted relative risks of a low-birthweight baby.

Usage

data("Birth")

Format

A data frame with 900 observations on the following 5 variables.

lowbw

low birth weight delivery (1=yes)

alc

mother's alcohol drinking frequency (1=Light, 2=Moderate, 3=Heavy)

smo

mother smoked (1=no)

soc

mother's social status (1=I and II (lower), 2=III (middle), 3=IV and V (upper))

References

Wright JT, Waterson EJ, Barrison PJ, et al. (1983). Alcohol consumption, pregnancy and low birthweight. Lancet 1:663-665.

Examples

# NOT RUN {
data(Birth)
dim(Birth)
names(Birth)

# }