Table 1. Inclusion and Exclusion Criteria for Our Pilot Study for K-LUCAS Project.

Inclusion Criteria	Exclusion Criteria
Age of 55–74 years	Past history of lung cancer
Asymptomatic current or ex-smoker	ECOG score of ≥ 2
Smoking history of at least 30 pack-years and tobacco use within last 15 years	Treatment for pulmonary tuberculosis, pneumonia, or interstitial lung disease
	Diagnosis of other cancers* within 5 years before enrollment
	Chest CT performed within 6 months before enrollment

^*All cancers excluding thyroid cancer and skin cancer. CT = computed tomography, ECOG = Eastern Cooperative Oncology Group, K-LUCAS = Korean Lung Cancer Screening