Causes of Inaccurate Fecal Occult Blood Test Results False Positive gFOBT: Ingestion of nonhuman heme (eg, meat products) Ingestion of peroxidases (eg, broccoli) Ingestion of non-Gl blood (eg, epistaxis) Use of aspirin, NSAIDS, or anticoagulant medication False Positive FIT: Use of aspirin, NSAlDs, or medication #Guaiac #FOBT #Fecal #OccultBlood #Testing #Laboratory #FalsePositive #FalseNegative #Diagnosis #Differential #Accuracy #Inaccurate #Stool
