plasma: A Data Set for Cgam

In cgam: Constrained Generalized Additive Model

A Data Set for Cgam

Description

This data set is used for the routine plotpersp. It contains 314 observations of blood plasma, beta carotene measurements along with several covariates. High levels of blood plasma and beta carotene are believed to be protective against cancer, and it is of interest to determine the relationships with covariates.

Usage

data(plasma)

Format

logplasma

A numeric vector of the logarithm of plasma levels.

betacaro

A numeric vector of dietary beta carotene consumed mcg per day.

bmi

A numeric vector of BMI values.

cholest

A numeric vector of cholesterol consumed mg per day.

dietfat

A numeric vector of the logarithm of grams of diet fat consumed per day.

fiber

A numeric vector of grams of fiber consumed per day.

retinol

A numeric vector of retinol consumed per day.

smoke

A numeric vector of smoking status (1=Never, 2=Former, 3=Current Smoker).

vituse

A numeric vector of vitamin use (1=Yes, fairly often, 2=Yes, not often, 3=No).

References

Nierenberg, D.,Stukel, T.,Baron, J.,Dain, B.,and Greenberg, E. (1989) Determinants of plasma levels of beta-carotene and retinol. American Journal of Epidemiology 130, 511–521.

Examples

data(plasma)

cgam documentation built on June 8, 2025, 1:45 p.m.