Does screening reduce lung cancer mortality?
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Neither routine chest x-ray (with or without sputum cytology) nor low-dose computed tomography (CT) have been proven to reduce mortality when used for lung cancer screening, although low-dose CT screening does identify lung cancer at an early stage in high-risk patients (strength of recommendation: B, based on heterogeneous cohort studies). Large studies of both imaging approaches are ongoing.
Journal of Family Practice, 57(1) 2008: 49-50.