INTRODUCTION
Different diagnostic procedures or treatments employed in colorectal cancer patients have been included as indicators of the quality of care1,2. However, the fulfillment of those indicators and their relationship with different outcomes, not only clinical but also patient-reported outcome measures (PROMs), has not been established thus far. The goal of this study was to select four main procedures (CT scanning and colonoscopy) or treatments (chemotherapy or radiotherapy) usually indicated for colorectal cancer patients in their diagnosis, treatment and follow-up and to see how their performance was related to various robust clinical outcomes and some PROMs in a long follow-up of five years.