Juul's IGF data, extended version

Description

The juul2 data frame has 1339 rows and 8 columns; extended version of |juul|.

Usage

juul2

Format

This data frame contains the following columns:

age

a numeric vector (years).

height

a numeric vector (cm).

menarche

a numeric vector. Has menarche occurred (code 1: no, 2: yes)?

sex

a numeric vector (1: boy, 2: girl).

igf1

a numeric vector, insulin-like growth factor (microgram per liter).

tanner

a numeric vector, codes 1–5: Stages of puberty ad modum Tanner.

testvol

a numeric vector, testicular volume (ml).

weight

a numeric vector, weight (kg).

Source

Original data.

Examples

plot(igf1~age, data=juul2)