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/).