Comparative study of survival of screen‐detected compared with symptom‐detected lung cancer cases

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Abstract
Survival rates were studied in 1,297 screen‐detected and 1297 symptom‐detected patients with lung cancer. Resections took place in 20 hospitals and institutions in the Japanese Lung Cancer Screening Research Group. 60.6% of the screen‐detected lung cancer patients were from stage 0 to 11 and 39.4% were from stage III and TV. On the other hand, 27.1% of symptom‐detected patients were from stage 0 to 11 and 72.9% were stage III to IV. In the screen‐detected group, the tumor was peripheral in 83%, adenocarcinoma in 52.4% and the resectability rate was 66.5%. Five‐ and 10‐year survival rates were 32.4% and 22.5% respectively in the screen‐detected patients and 13.7% and 9.9% in symptom‐detected patients.