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Coffee, tea, and mortality

A L Klatsky1, M A Armstrong, G D Friedman

  • 1Department of Medicine, Kaiser Permanente Medical Care Program, Oakland, CA.

Annals of Epidemiology
|July 1, 1993
PubMed
Summary
This summary is machine-generated.

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Coffee and tea consumption show no overall link to mortality risk. While heavy coffee intake may slightly increase coronary risk, this is offset by reduced risks of liver cirrhosis and suicide.

Area of Science:

  • Epidemiology
  • Public Health
  • Nutritional Science

Background:

  • Widespread consumption of coffee and tea necessitates understanding their long-term health effects.
  • Previous studies on coffee, tea, and mortality have yielded conflicting evidence, particularly regarding coronary disease.
  • Limitations in prior research highlight the need for robust analysis of beverage consumption and mortality risk.

Purpose of the Study:

  • To investigate the association between coffee and tea consumption and overall mortality risk.
  • To examine the relationship between coffee and tea intake and major causes of death, including coronary disease, liver cirrhosis, and suicide.
  • To clarify the impact of regular beverage consumption on long-term health outcomes.

Main Methods:

  • Utilized Cox proportional hazards models with ten covariates to analyze data from 128,934 individuals.

Related Experiment Videos

  • Tracked mortality events, totaling 4501 deaths, over a defined follow-up period.
  • Performed adjusted analyses to account for potential confounding factors.

    • Main Results:

    • No increased overall mortality risk was observed for coffee or tea consumption.
    • A slight, non-statistically significant increase in acute myocardial infarction risk was noted for very heavy coffee drinkers (≥4 cups/day).
    • Coffee consumption was associated with a significantly lower risk of liver cirrhosis mortality (RR=0.77 per cup/day) and suicide (RR=0.87 per cup/day).

    Conclusions:

    • Coffee and tea consumption do not appear to be associated with an overall increased risk of mortality.
    • Any potential increase in coronary risk from coffee may be counterbalanced by reduced risks of other conditions like liver cirrhosis and suicide.
    • Further research is warranted to elucidate the complex relationship between coffee, tea, and specific mortality causes.