According to results from a national survey, improved survival and increased detection of cancer with screenings are mistakenly interpreted by most primary care physicians (PCPs) as evidence that screening saves lives. When presented with irrelevant evidence, 69% of PCPs recommended a test, compared with 23% when presented with relevant evidence. Nearly half (47%) stated incorrectly that detecting more cancer cases in screened versus unscreened patients proves that screening saves lives.

Abstract: Annals of Internal Medicine, March 6, 2012.