Infant vital statistic data from North Carolina

Description

Individual-level infant mortality data on 387,705 births in the U.S. state of North Carolina, between 2007 and 2009, inclusive.

Usage

1

Format

A data frame with 387,705 observations on the following 17 variables.

county

North Carolina county in which birth occurred

year

Year of birth

sex

Infant's gender

race

Race of mother/child

mage

Age of mother

plural

Plurality

weeks

Completed weeks of gestation (calculated)

weight

Birth weight group

gained

Weight gained by mother during pregnancy, in pounds (up to 98 lbs; values of 98 represent 98 or more pounds gained during pregnancy)

cignum

Number of cigarettes smoked by mother per day, up to 97. 98 represents a smoking mother, where the number of cigarettes smoked per day is unknown.

nonwhite

Logical vector: race variable not equal to 1

smoker

Logical vector: cignum not equal to 0

olderm

Logical vector: mother's age >= 35

lowbw

Logical vector: infant's birth weight <= 2500 grams

lowgain

Logical vector: mother gained less than 15 pounds during pregnancy

female

Logical vector: infant's sex is female

preemie

Logical vector: infant born before completing gestational week 37

Details

The sex variable is coded as follows: 1 = Male 2 = Female

The race variable is coded as follows: 0 = Other non-white 1 = White 2 = Black 3 = American Indian 4 = Chinese 5 = Japanese 6 = Hawaiin 7 = Filipino 8 = Other Asian or Pacific Islander

The plural variable is coded as follows: 1 = Singleton 2 = Twins 3 = Triplets 4 = Quadruplets 5 = Quintuplets of higher 9 = Unknown

The weight variable is coded as follows: 0 = 500 grams or less 1 = 501 to 1000 grams 2 = 1001 to 1500 grams 3 = 1501 to 2000 grams 4 = 2001 to 2500 grams 5 = 2501 to 3000 grams 6 = 3001 to 3500 grams 7 = 3501 to 4000 grams 8 = 4001 to 4500 grams 9 = 4501 grams or more

Source

The data were compiled by the North Carolina State Center for Health Statistics (http://www.irss.unc.edu/).