Abstract
Three prospective studies of lung cancer In older men are compared: the Philadelphia Pulmonary Neoplasm Research Project, the North West London study, and the South London study. Comparison of survival in men with lung cancer is difficult because of differences in methods, materials, and analyses. However, despite semiannual roentgenographic screening, the prognosis of lung cancer in older men remains poor. The results in London were slightly better than might be expected without screening. The results in Philadelphia were not as favorable. The differences was due primarily to the fact that the lung cancer patients in Philadelphia were older than those in London.
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