Birth outcome data
births.RdData on birth outcomes in the United States for December 2021 births where mother's age is between 25 and 35 (inclusive), limited to singleton births, mother's first child, and having non-missing values for relevant variables
Format
births
A data frame with 50,249 rows and 20 columns:
- birthtime
Birth time during day (in minutes, range is 0 to 2399)
- birthwkday
Day of week of birth (1=Sunday, 2=Monday, ..., 7=Saturday)
- age
Mother's age (in years)
- nonhsgrad
1 if mother is not a HS graduate, 0 otherwise
- hsgrad
1 if mother is HS graduate and has no add'l education, 0 otherwise
- somecoll
1 if mother completed some college, 0 otherwise
- collgrad
1 if mother is 4-year college graduate, 0 otherwise
- married
1 if mother is married, 0 otherwise
- smoke1
1 if mother smoked during first trimester, 0 otherwise
- smoke2
1 if mother smoked during second trimester, 0 otherwise
- smoke3
1 if mother smoked during third trimester, 0 otherwise
- smokepre
1 if mother smoked before pregnancy, 0 otherwise
- smoke
1 if mother smoked during pregnancy (any trimester), 0 otherwise
- prenatal1
1 if first prenatal care during first trimester, 0 otherwise
- prenatal2
1 if first prenatal care during second trimester, 0 otherwise
- prenatal3
1 if first prenatal care during third trimester, 0 otherwise
- nocare
1 if no prenatal care visit, 0 otherwise
- male
1 if baby is a boy, 0 otherwise
- bweight
Birthweight (in grams)
- bweight_lbs
Birthweight (in pounds)