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Related Experiment Videos

Screening for lung cancer.

R L Manser1, L B Irving, C Stone

  • 1Clinical Epidemiology and Health Service Evaluation Unit, Royal Melbourne Hospital, Grattan Street, Parkville, Victoria, Australia.

The Cochrane Database of Systematic Reviews
|February 20, 2004
PubMed
Summary
This summary is machine-generated.

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Lung cancer screening with chest radiography or sputum cytology is not supported by current evidence. Frequent chest x-ray screening may increase lung cancer mortality, necessitating rigorous trials.

Area of Science:

  • Oncology
  • Public Health
  • Diagnostic Imaging

Background:

  • Population-based lung cancer screening is not widely adopted globally.
  • The effectiveness of sputum examination, chest radiography, and computed tomography (CT) in reducing lung cancer mortality remains unclear.

Purpose of the Study:

  • To evaluate the impact of lung cancer screening methods on mortality.
  • Specifically assessing sputum examinations, chest radiography, and CT chest screening efficacy.

Main Methods:

  • Systematic review of published and unpublished controlled trials (1966-2000).
  • Included randomized controlled studies and non-randomized controlled trials.
  • Data analyzed using intention-to-screen analysis, random effects model for heterogeneity, and fixed effect model for other outcomes.

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Main Results:

  • Seven trials involving 245,610 subjects were analyzed; none had an unscreened control group.
  • Frequent chest x-ray screening showed an 11% relative increase in lung cancer mortality.
  • A non-significant trend towards reduced mortality was observed with combined chest x-ray and sputum cytology versus chest x-ray alone.
  • Methodological weaknesses were noted in several studies; no controlled spiral CT studies were found.

Conclusions:

  • Current evidence does not support lung cancer screening via chest radiography or sputum cytology.
  • Frequent chest x-ray screening may potentially increase lung cancer mortality.
  • Further methodologically rigorous trials are essential to clarify screening effectiveness.