mandible {GLMsData}

Mandible length and gestational age

Description

The data give the mandible length and gestational age for 167 foetuses from the 12th week of gestation onwards

Usage

data(mandible)

Format

A data frame with 167 observations on the following 2 variables.

Age

the gestational age (in weeks); a numeric vector

Length

the mandible length (in mm); a numeric vector

Details

The data give the mandible length and gestational age for 167 foetuses from the 12th week of gestation onwards, measured using ultrasound.

Source

Patrick Royston and Douglas G. Altman (1994) Regression using fractional polynomials of continuous covariates: Parsimonious parametric modelling. Applied Statistics, 43(3), 429–467.

Examples

data(mandible)
plot(mandible)