Time lag to benefit after screening for breast and colorectal cancer: meta-analysis of survival data from the United States, Sweden, United Kingdom, and Denmark.

The article discusses that after screening for breast or colorectal cancer, what is the time lag needed before cancer deaths are seen. According to a research paper by Sei J Lee and colleagues, cancer screening does help in preventing cancer deaths in the future, the time to benefit from is unclear. The paper adds that the screening prevents one cancer death per 1000 patients screened at 10 years, and it should be carried out on patients who have a life expectancy of more than 10 years.