Lung Cancer Mortality in the Lung Screening Study Feasibility Trial.

Area of Science:

• Pulmonology
• Radiology
• Oncology

Background:

• Lung cancer remains a leading cause of cancer death worldwide.
• Early detection through screening is crucial for improving patient outcomes.
• Screening modalities like low-dose computed tomography (LDCT) and chest X-ray (CXR) are being evaluated for their efficacy.

Purpose of the Study:

• To assess the feasibility and long-term mortality outcomes of lung cancer screening using LDCT versus CXR.
• To compare lung-cancer-specific mortality rates between the two screening arms.
• To evaluate differences in all-cause mortality between LDCT and CXR screening groups.

Main Methods:

• A multicenter controlled feasibility trial involving 3318 subjects.
• Random assignment to two rounds of screening with either LDCT or CXR.
• Long-term mortality follow-up using the National Death Index.

Main Results:

• Median follow-up was 5.2 years for 1660 subjects in the LDCT arm and 1658 in the CXR arm.
• Lung cancer death rates were 3.84 per 1000 person-years for LDCT and 3.10 for CXR (Risk Ratio = 1.24).
• All-cause mortality risk ratio was 1.20 (95% CI = 0.94 to 1.54) favoring CXR.

Conclusions:

• The Lung Screening Study provides valuable feasibility data on LDCT versus CXR for lung cancer screening.
• Findings suggest a potential trend towards increased mortality with LDCT, warranting further investigation.
• This study contributes to the ongoing evaluation of LDCT's role in lung cancer screening programs.