Colorectal cancer is a leading cause of cancer-related morbidity and mortality. CRC-related death can be prevented through fecal occult blood test screening. Because of economic and high sensitivity, fecal immunochemical test is recommended for screening population of CRC. The purpose of this study is to compare the accuracy of 4 different fecal occult blood testing in medium and high risk screening population in Chinese.
Colorectal cancer (CRC) is one of the most common cancer worldwide, and cause a huge number of cancer-associated mortality. CRC screening has been shown to be effective in reducing the incidence of, and mortality from, CRC. There are several recommended screening options for screening population of CRC, including colonoscopy and fecal occult blood testing (FOBT) .Colonoscopy has higher sensitivity and specificity than FOBT for detecting advanced colorectal neoplasia but also has several disadvantages, including higher cost and poorer compliance. Therefore, many patients prefer FOBT to colonoscopy. FOBT includes guaiac-based fecal occult blood test (gFOBT) and fecal immunochemical test (FIT). FIT includes quantitative FIT (qFIT) and qualitative FIT. qFIT can provide a value of concentration of hemoglobin in stool and are increasingly recommended for CRC. In China, the most common use FOBT is qualitative FIT and the comparison of quantitative and qualitative FIT is lack in screening population of CRC in Chinese. To add to the evidence on FIT performance characteristics for detection of CRC, the investigators design this research to compare qFIT with other 3 qualitative FOBT（two of them are colloidal gold qualitative FITs and one of them is chemical and immunologic combined detection）in medium and high risk screening population.
Study Type
OBSERVATIONAL
Enrollment
1,000
Detect Hb in stool by 4 kind of FOBT and detect colon lesion using colonoscopy and pathological examination.
Qilu Hospital
Jinan, Shandong, China
The accuracy of 4 kind of FOBTs to diagnose CRC.
The sensitivity, specificity, positive predictive value and negative predictive value of these 4 FOBTs to detect CRC.
Time frame: 6 months
The accuracy of 4 kind of FOBTs to diagnose advanced colorectal neoplasm.
The sensitivity, specificity, positive predictive value and negative predictive value of these 4 FOBTs to detect advanced colorectal neoplasm.
Time frame: 6 months
The accuracy of 4 kind of FOBTs to diagnose advanced adenoma.
The sensitivity, specificity, positive predictive value and negative predictive value of these 4 FOBTs to detect advanced adenoma.
Time frame: 6 months
Develop a predictive model of CRC or advanced colorectal neoplasm which includes qFIT.
Develop a predictive model of CRC or advanced colorectal neoplasm which includes qFIT, age ,sex, CRC family history and so on.
Time frame: 6 months
Explore the cost-benefit ratio of one or two-sample of qFIT.
Explore the cost-benefit ratio of one or two-sample of qFIT.
Time frame: 6 month
Explore the reason of false positive of qFIT
Calculate false positive rate of the 4 kind of FOBTs. and count the case number of inflammatory bowel disease, colonic diverticulitis, hemorrhoids, upper gastrointestinal disease or medical factors that cause false positive of qFIT.
Time frame: 6 month
Explore the effect of aspirin or other anticoagulants to the diagnose accuracy of qFIT
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Count sensitivity and specificity with or without patients who take aspirin or other anticoagulants.
Time frame: 6 month