The Diagnostic Accuracy of a Fecal Immunochemical Test in Detecting Colorectal Cancer and Advanced Precancerous Colorectal Neoplasia in Patients with Iron Deficiency: A Protocol for Systematic Review and Meta-Analysis

Table 1

Summary of inclusion and exclusion criteria.

	Inclusion criteria	Exclusion criteria
Population	(i) 18 years and older; (ii) Any sex; (iii) Diagnosed with ID, with or without anemia	(i) Known coexisting cancer of any type; (ii) Known genetic predisposition for CRC including Lynch syndrome and familial adenomatous polyposis; (iii) Known inflammatory bowel disease; (iv) Known hematological diseases; (v) Known coeliac disease
Intervention	(i) Quantitative FIT	(i) Guaiac-based fecal test; (ii) Nonquantitative FIT
Comparison	(i) Colonoscopy done within 6 months after FIT	(i) Other screening options including sigmoidoscopy and CT colonography
Study type	(i) Cohort studies; (ii) Cross-sectional studies; (iii) Case-control studies; (iv) Clinical trials; (v) Randomised controlled trials	(i) Reviews; (ii) Case studies; (iii) Animal models; (iv) In vitro studies