Figure 1. Mortality in Randomized Controlled Trialsa of Lung Cancer Screening with Chest Radiography with or without Sputum Cytology
![Chart showing the relative risks and 95-percent confidence intervals for mortality outcomes in 6 randomized controlled trials of lung cancer screening with chest radiography with or without sputum cytology. Go to Text Description [D] for details.](lungfig1.gif)
[D] Select for Text Description.
a Followup ranged from 3 to 20 years among the 6 studies.
b Solid black square size represents Mantel-Haenszel weight.
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