The effect of zinc supplementation on pregnancy outcome.

What Was Tested

The paper reports a study of Vitamin D, K2, Magnesium and Zinc, published as a randomized controlled trial.

Who Took Part

By PubMed's age tags, the people studied were adults, women only.

Outpatient clinic and delivery service at the University of Alabama at Birmingham.

Five hundred eighty medically indigent but otherwise healthy African-American pregnant women with plasma zinc levels below the median at enrollment in prenatal care, randomized at 19 weeks' gestational age.

How the Study Was Run

The design is described as randomized, double-blind and placebo-controlled.

The participants were allocated by chance, so the Vitamin D, K2, Magnesium and Zinc group and the comparison group should start out alike.

As a double-blind Vitamin D, K2, Magnesium and Zinc study, the assignments were hidden from both participants and investigators until the end.

A placebo (an inactive look-alike) gave the Vitamin D, K2, Magnesium and Zinc group a baseline to be compared against.

A randomized double-blind placebo-controlled trial.

Women were subdivided by the population median body mass index of 26 kg/m2 into two groups for additional analyses.

What Was Measured

PubMed files the paper under topics including Black or African American, Anthropometry, Birth Weight, Gestational Age, Linear Models, Maternal Age and Pregnancy Outcome.

What This Means in Plain Language

The paper is a randomized, double-blind and placebo-controlled study of Vitamin D, K2, Magnesium and Zinc.

Its findings take up roughly 5 sentences of the abstract and are left out here on purpose; the source paper is the place to read them.

The publication is from 1995 (JAMA), a journal based in United States.

More context: the Vitamin D, K2, Magnesium and Zinc compound page, all human trials.