bttstudy: The South African Birth to Ten (BTT) study

In GLMsData: Generalized Linear Model Data Sets

The South African Birth to Ten (BTT) study

Description

The data record details about the Birth to Ten study (btt) in South Africa during 1990

Usage

data(bttstudy)

Format

A data frame with 8 observations on the following 4 variables.

Counts

the number of subjects in the given classification; a numeric vector

Group

the group the mother belongs to; a numeric vector with levels 1 (mothers not followed up), 2 (mothers followed up five years later)

MedicalAid

whether or not the mother had medical aid; a factor with levels No and Yes

Race

the mother's race; a factor with levels Black and White

Details

The data record details about the Birth to Ten study (btt), performed in the greater Johannesburg/Soweto metropolitan area of South Africa during 1990. In the study, all mothers of singleton births were interviewed during a seven-week period between April and June to women with permanent addresses in a defined area (a total of 4019 births). Five years later, 964 of these mothers were re-interviewed. If the mothers interviewed later and representative of the original populations, the two groups should show similar characteristics. One of those characteristics is documented here: the proportion with and without medical aid.

Source

Christopher H. Morrell (1999) Simpson's Paradox: An example from a longitudinal study in South Africa. Journal of Statistics Education, 7(3).

Examples

data(bttstudy)
summary(bttstudy)

GLMsData documentation built on Aug. 22, 2022, 9:10 a.m.