infants {GJRM.data}R Documentation

Infant statistic data from North Carolina

Description

Individual-level infant mortality data on 20000 randomly selected births of female babies in the U.S. state of North Carolina, in 2008, together with polygons describing the county shapes.

Usage

data(infants)
data(NC.polys)

Format

infants is a 20000 row data frame with the following columns:

county

Number code identifying North Carolina county in which birth occurred, and matching names(NC.polys). It can take 100 possible values.

age

Age of mother.

wksgest

Completed weeks of gestation.

marital

Equal to 1 if married, and 0 otherwise.

grams

Infant's birth weight.

lbw

Equal to 1 if infant's birth weight < 2500 grams, and 0 otherwise.

ethnicity

Four categories of ethnicity: White, Hispanic, Black, Other.

educ

Education of mother: Primary, Secondary, Tertiary.

smoke

Equal to 1 if smoker, and 0 otherwise.

firstbirth

Equal to 1 if it was the mother's first birth, and 0 otherwise.

ptb

Equal to 1 if completed weeks of gestation < 37.

NC.polys contains the polygons defining the areas in the format described below.

Details

The data frame infants relates to the counties whose boundaries are coded in NC.polys. NC.polys[[i]] is a 2 column matrix, containing the vertices of the polygons defining the boundary of the ith county. names(NC.polys) matches infants$county (order unimportant).

Source

The data were compiled by the North Carolina State Center for Health Statistics (https://schs.dph.ncdhhs.gov/).


[Package GJRM.data version 0.1-1 Index]