尽管人群筛查改善了结直肠癌（CRC）的早期诊断，但大多数病例仍在症状患者中被诊断出来。本研究旨在估计西班牙50-69岁个体中粪便免疫化学试验（FIT）作为CRC筛查测试的接受模式的患病率和时间演变情况，并基于社会人口学、健康和生活方式特征确定此类筛查接受模式的预测因素。本横断面研究涵盖了2017年西班牙国家卫生调查和2020年欧洲卫生调查的14,163名个体，主要变量为过去2年内接受FIT筛查的接受模式，我们基于此分析了社会人口学因素、健康状况和生活习惯。在过去的2年中，38.01％的参与者进行了FIT检查，并观察到CRC接受率的显著增加（2017年：32.35％，2020年：43.92％，p <0.001）。FIT接受模式的积极预测因素包括年龄在57至69岁之间、具有更高教育水平或更高社会阶层、至少患有一种慢性疾病、经常与初级医疗医生接触、饮酒和体育锻炼，而移民和吸烟习惯则是负面预测因素。尽管西班牙FIT接受模式的演变趋势是积极的，但FIT接受率仍然较低（38.01％），未达到欧洲指南所认为的可接受水平。此外，各个个体之间在CRC筛查接受率上存在差异。版权所有©2023 Portero de la Cruz和Cebrino。

Although population screening has improved the early diagnosis of colorectal cancer (CRC), most cases are diagnosed in symptomatic patients. This study aimed to estimate the prevalence and evolution over time of uptake patterns to fecal immunochemical test (FIT) as a screening test for CRC among individuals aged 50-69 in Spain, and to determine the predictive factors for uptake patterns to this type of screening based on sociodemographic, health, and lifestyle characteristics.A cross-sectional study with 14,163 individuals from the 2017 Spanish National Health Survey and the 2020 European Health Survey was performed, including as the main variable uptake pattern to FIT screening within the last 2 years, with which we analyzed sociodemographic factors, health status and lifestyle habits.38.01% of participants had undergone FIT in the previous 2 years, and from 2017 to 2020, a significant increase in the uptake rate for CRC was observed (2017: 32.35%, 2020: 43.92%, p < 0.001). The positive predictors to FIT uptake pattern included factors such as being between 57 and 69 years, having a higher educational level or a higher social class, having at least one chronic illness, frequent contact with the primary care physician, alcohol consumption and physical activity, while immigration and smoking habit were negative predictors.In Spain, although the evolution of FIT uptake pattern over time is positive, the prevalence of FIT uptake is still low (38.01%), not reaching the level considered as acceptable in the European guidelines. Moreover, there are disparities in CRC screening uptake among individuals.Copyright © 2023 Portero de la Cruz and Cebrino.