The findings demonstrate the importance of low-dose CT screening for early detection of lung cancer.
The researchers also included participants who have smoked less than 10 pack-years, including those who had never smoked cigarettes but had passive exposure to cigarette smoke.
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“The less than 10 pack-years of smoking includes people who have never smoked,” Dr. Henschke said. “In the United States, some 25% of lung cancers are diagnosed in people who have never smoked.”
The results from this study show that after 20 years, patients diagnosed with lung cancer at an early stage via CT screening have significantly better outcomes. By treating the cancer when it is small, patients can be effectively cured in the long term.
“Lung cancer can be cured if you enroll in an annual screening program using a well-defined protocol and comprehensive management system,” Dr. Henschke said. “It is important to return for annual screening.”
The U.S. Preventive Services Task Force recommends annual lung cancer screening with low-dose CT in adults aged 50 to 80 years who have a 20 pack-year smoking history and currently smoke or have quit within the past 15 years.
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