muscatine: Obesity from the Muscatine coronary risk factor study

In ALA: Data sets and examples for the book "Applied Longitudinal Analysis"

Description

The data are from the Muscatine Coronary Risk Factor (MCRF) study, a longitudinal survey of school-age children in Muscatine, Iowa.

Usage

data(muscatine)

Format

A data frame with 14568 observations on the following 6 variables.

id

a factor with 4856 levels

gender

a factor with levels M and F

age0

a numeric vector; initial age

age

a numeric vector

year

a numeric vector

obesity

a factor with levels non-obese and obese

Details

The MCRF study had the goal of examining the development and persistence of risk factors for coronary disease in children. In the MCRF study, weight and height measurements of five cohorts of children, initially aged 5-7, 7-9, 9-11, 11-13, and 13-15 years, were obtained biennially from 1977 to 1981. Data were collected on 4856 boys and girls. On the basis of a comparison of their weight to age-gender specific norms, children were classified as obese or not obese.

Note

Original variable names have been adapted to R conventions. Variable Occasion in the source was recoded to year, as that is what it represents.

Age denotes mid-point of age-cohort.

Source

http://biosun1.harvard.edu/~fitzmaur/ala

References

Woolson RF, Clarke WR (1984) Analysis of categorical incomplete longitudinal data. Journal of the Royal Statistical Society, Series A 147:87-99.

Examples

str(muscatine)
summary(muscatine)

ALA documentation built on May 2, 2019, 5:39 p.m.