plasma: Plasma Concentration of Beta-Carotene and Retinol
In qrjoint: Joint Estimation in Linear Quantile Regression

plasma

R Documentation

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.