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Related Experiment Videos

Anencephalus and drinking water composition.

J M Elwood

    American Journal of Epidemiology
    |May 1, 1977
    PubMed
    Summary
    This summary is machine-generated.

    Higher magnesium in drinking water was linked to lower infant mortality from anencephalus in Canadian cities. This association, along with income and longitude, helped explain variations in birth defect death rates.

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    Area of Science:

    • Environmental Health
    • Epidemiology
    • Public Health

    Background:

    • Congenital anomalies like anencephalus and spina bifida contribute significantly to infant mortality.
    • Water quality, including mineral content, is being investigated for its potential role in birth defect etiology.
    • Previous research has explored various environmental factors, but the specific impact of water magnesium requires further examination.

    Purpose of the Study:

    • To investigate the association between magnesium concentration in drinking water and mortality rates from anencephalus.
    • To explore the relationship between water magnesium, income, and longitude with various congenital abnormality mortality rates.
    • To determine the extent to which these factors explain intercity variations in mortality.

    Main Methods:

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    • Analysis of mortality data (stillbirths and infant deaths) for anencephalus and other congenital abnormalities from 1950-1969 in 36 Canadian cities.
    • Correlation and multiple regression analyses were performed using mortality rates, water magnesium concentration, mean income, and longitude.
    • Water samples from domestic taps were analyzed for magnesium concentration, calcium concentration, and total hardness.

    Main Results:

    • A significant negative association was found between water magnesium concentration and anencephalus mortality rates (r = -.39).
    • A multiple regression model including magnesium, income, and longitude explained 69% of the intercity variation in anencephalus mortality.
    • Negative associations were observed for magnesium with other congenital abnormalities and total stillbirths and infant deaths, though significance varied.

    Conclusions:

    • Magnesium concentration in drinking water may play a protective role in reducing anencephalus mortality.
    • Water magnesium, income, and longitude are significant factors influencing intercity variations in congenital anomaly mortality rates.
    • Further research is warranted to confirm the protective effect of magnesium and elucidate the underlying mechanisms.