Gestation: Data from the Child Health and Development Studies
In mosaicData: Project MOSAIC Data Sets

Gestation

R Documentation

Data from the Child Health and Development Studies

Description

Birth weight, date, and gestational period collected as part of the Child Health and Development Studies in 1961 and 1962. Information about the baby's parents — age, education, height, weight, and whether the mother smoked is also recorded.

Usage

data(Gestation)

Format

A data frame with 1236 observations on the following variables.

id: identification number
plurality: all "single fetus" in this data set
outcome: all "live birth" (survived at least 28 days) in this data set
date: birth date where 1096=January 1, 1961
gestation: length of gestation (in days)
wt: birth weight (in ounces)
parity: total number of previous pregnancies (including fetal deaths and still births)
sex: "male"
race: mother's race: "asian", "black", "mex", "mixed", or "white"
age: mother's age in years at termination of pregnancy
ed: mother's education
ht: mother's height in inches to the last completed inch
wt.1: mother's prepregnancy weight (in pounds)
drace: father's race
dage: father's age (in years)
ded: father's education
dht: father's height in inches to the last completed inch
dwt: father's weight (in pounds)
marital: marital status

inc: family yearly income in $2500 increments
smoke: does mother smoke? (never, smokes now, until current pregnancy, once did, not now)
time: time since quitting smoking (never smoked, still smokes, during current preg, within 1 year, 1 to 2 years ago, 2 to 3 years ago, 3 to 4 years ago, 5 to 9 years ago, 10+ years ago, quit and don't know
number: number of cigarettes smoked per day for past and current smokers (never, 1-4, 5-9, 10-14, 15-19, 20-29, 30-39, 40-60, 60+, smoke but don't know)

Details

The data were presented by Nolan and Speed to address the question of whether there is a link between maternal smoking and the baby's health for male births.

Source

The book by Nolan and Speed describes the data in more detail and provides an Internet site for accessing them: https://www.stat.berkeley.edu/users/statlabs/