infants0709 {osDesign} | R Documentation |
Individual-level infant mortality data on 387,705 births in the U.S. state of North Carolina, between 2007 and 2009, inclusive.
data(infants0709)
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
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
The data were compiled by the North Carolina State Center for Health Statistics (http://www.irss.unc.edu/).