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Knowing When to Say Yes to Medical Technology
The Health Care Blog

In 2011, the New England Journal of Medicine reported results of the National Lung Screening Trial (NLST). Screening trials have to be big, because almost all the people who are screened don’t have the disease being investigated, and screening only helps people with silent disease.

The NLST had over 50,000 participants, all with a history of abusing their lungs through heavy smoking. Half were randomly assigned to have three annual low-dose helical chest computed tomography (CT) exams, and half were assigned to have three annual chest x-rays.

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