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Plasma Concentration of Beta-Carotene and Retinol

Description

Plasma concentration levels of beta-carotene and retinol along with dietary intake and drug usage measurements for 315 patients who had an elective surgical procedure during a three-year period to biopsy or remove a lesion of the lung, colon, breast, skin, ovary or uterus that was found to be non-cancerous.

Usage

data(plasma)

Format

A data frame with 315 observations on the following 14 variables.

Age

age (years)

Sex

sex (1=Male, 2=Female)

SmokStat

smoking status (1=Never, 2=Former, 3=Current)

Quetelet

Quetlet index, aka, BMI (weight / height^2)

VitUse

vitamin use (0=No, 1=Yes, not often, 2=Yes, fairly often)

Calories

number of calories consumed per day

Fat

grams of fat consumed per day

Fiber

grams of fiber consumed per day

Alcohol

number of alcoholic drinks consumed per week

Cholesterol

cholesterol consumed (mg per day)

BetaDiet

dietary beta-carotene consumed (mcg per day)

RetDiet

dietary retinol consumed (mcg per day)

BetaPlasma

plasma beta-carotene concentration (ng/ml)

RetPlasma

plasma retinol concentration (ng/ml)

Details

Dietary intakes are self-reported. Results from analyzing this data should be used with caution!

Source

Statlib database

References

Nierenberg, D. W., T. A. Stukel, J. A. Baron, B. J. Dain, and E. R. Greenberg (1989). Determinants of plasma levels of beta-carotene and retinol. American Journal of Epidemiology, 130(3), 511–521.

Examples

data(plasma)