Predictors of advanced colorectal neoplasia at initial and surveillance colonoscopy after positive screening immunochemical faecal occult blood test.

Background: Characteristics such as gender and lifestyle are not taken in account in colorectal cancer screening and surveillance recommendations.

Aims: To identify factors associated with advanced neoplasia at initial and surveillance colonoscopy.

Methods: In this observational study, 750 individuals with positive faecal occult blood test, aged 50-74 years, underwent a first screening colonoscopy in 2007-2009.