Follow-up after screening for colorectal neoplasms with fecal occult blood testing in a controlled trial

Abstract

The results indicate that screening and rescreening of a population has little influence upon the stage of the carcinomas in the test group compared with a control group during the first seven years of follow-up. The number of carcinomas was higher in the control than in the test group during the follow-up, probably because of a lead time effect during the screening.