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Related Experiment Videos

Leukemia in telephone linemen

G M Matanoski1, E A Elliott, P N Breysse

  • 1Department of Epidemiology, Johns Hopkins University, School of Hygiene and Public Health, Baltimore, MD 21205.

American Journal of Epidemiology
|March 15, 1993
PubMed
Summary

This study found that telephone lineworkers with higher cumulative exposure scores had a 2.5-fold increased risk of leukemia. Risk increased with exposure duration, particularly for intermittent peak exposures occurring 10+ years prior to death.

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Area of Science:

  • Occupational Health
  • Epidemiology
  • Environmental Health

Background:

  • Previous studies have explored potential links between occupational exposures and cancer.
  • The American Telephone and Telegraph Company (AT&T) employed a large workforce in roles involving potential exposures.

Purpose of the Study:

  • To investigate the association between telephone linework and leukemia (excluding chronic lymphocytic leukemia) in retired AT&T workers.
  • To assess the impact of cumulative and peak exposure levels, as well as latency periods, on leukemia risk.

Main Methods:

  • A case-control study design was employed.
  • Exposure was assessed using job titles and a lifetime exposure score derived from industrial hygiene monitoring.
  • Analyses considered different latency periods (10 and 15 years) and cumulative exposure levels.

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Main Results:

  • Workers with lifetime exposure scores above the median showed a 2.5 times higher incidence of leukemia compared to those below the median.
  • An increasing risk trend was observed with increasing cumulative peak exposure scores (p for trend = 0.05).
  • Odds ratios for leukemia were elevated for latent periods of 10 years (OR=2.4) and 15 years (OR=6.6), particularly associated with peak exposures.

Conclusions:

  • The study suggests a potential association between telephone linework, especially peak exposures in roles like cable splicing, and an increased risk of leukemia.
  • Longer latency periods and intermittent peak exposures may be critical factors in this association.
  • The findings indicate a dose-response relationship, though the small sample size warrants cautious interpretation.