The goal of this low-risk interventional study is to analyze participants' assessment of colorectal cancer screening program through screening method preference and experience after FOBT analysis in screaned participant population for colorectal cancer; could include any of the following: both sexes, age 50-69 years, asympthomatic volunteers. The main aims to answer are:
* Values of experience of participants into screening programme. * Values of preferences of participants for screening methods.
Participants will answer two questionnaires and they'll be given their information and clinical data to investigator or health personnel.
Participants ages from 50 to 69 years (both included) at the time of informed consent signed.
Participants invited to participate in population-based screening programme who are eligible to undertake FOBT at the Primary Health Care Center.
Participants should sign an informed consent. They must understand the nature, significance, implications, and risks of the clinical study before signing the informed consent form.
Participants who have not delivery a stool sample in the Primary Health Care Center before signing the informed consent form.
Participants with a previous colonoscopy in consequence of a FOBT positive result.
Participants who are in a dependent personal or non-medical relationship with the Sponsor or the Investigators.