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Low-level lead exposure and renal function in the Normative Aging Study

M Payton1, H Hu, D Sparrow

  • 1Channing Laboratory, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115.

American Journal of Epidemiology
|November 1, 1994
PubMed
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Environmental lead exposure significantly impairs kidney function. Even low levels of lead in the blood correlate with reduced creatinine clearance, indicating decreased renal function in men.

Area of Science:

  • Environmental health
  • Nephrology
  • Toxicology

Background:

  • Occupational and environmental lead exposure is a known risk factor for impaired renal function.
  • Previous studies have indicated a link between lead exposure and kidney damage.

Purpose of the Study:

  • To investigate the cross-sectional relationship between blood lead concentration and creatinine clearance in a cohort of men.
  • To determine if low-level environmental lead exposure is associated with reduced kidney function.

Main Methods:

  • A cross-sectional study was conducted on 744 men aged 43-90 years from the Normative Aging Study.
  • Blood lead concentration and creatinine clearance were measured.
  • Multivariate linear regression analysis was used to assess the association, adjusting for confounders like age, BMI, and medication use.

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Main Results:

  • A significant negative association was found between blood lead concentration and creatinine clearance.
  • Each 10.0 microgram/dl increase in blood lead was associated with a 10.4 ml/minute decrease in creatinine clearance, even after adjustments.
  • The association remained significant after controlling for age, body mass index, and medication use.

Conclusions:

  • Low-level environmental lead exposure is associated with a significant decrement in renal function.
  • These findings support the hypothesis that lead exposure negatively impacts kidney function.
  • Further research may be warranted to explore mechanisms and long-term effects.