VGAM (version 1.1-12)

bmi.nz: Body Mass Index of New Zealand Adults Data

Description

The body mass indexes and ages from an approximate random sample of 700 New Zealand adults.

Usage

data(bmi.nz)

Format

A data frame with 700 observations on the following 2 variables.

age

a numeric vector; their age (years).

BMI

a numeric vector; their body mass indexes, which is their weight divided by the square of their height (kg / \(m^2\)).

Details

They are a random sample from the Fletcher Challenge/Auckland Heart and Health survey conducted in the early 1990s.

There are some outliers in the data set.

A variable gender would be useful, and may be added later.

References

MacMahon, S., Norton, R., Jackson, R., Mackie, M. J., Cheng, A., Vander Hoorn, S., Milne, A., McCulloch, A. (1995) Fletcher Challenge-University of Auckland Heart & Health Study: design and baseline findings. New Zealand Medical Journal, 108, 499--502.

Examples

if (FALSE)  with(bmi.nz, plot(age, BMI, col = "blue"))
fit <- vgam(BMI ~ s(age, df = c(2, 4, 2)), lms.yjn,
            data = bmi.nz, trace = TRUE)
qtplot(fit, pcol = "blue", tcol = "brown", lcol = "brown")