How should guaiac tests be ideally performed to detect fecal occult blood?
• Stool specimens should be collected over 3 consecutive days.
• Guaiac testing should be performed on a fresh specimen (< 7 days).
• Dry specimens should be rehydrated.
• Patients should refrain from eating red meat and cabbage, cauliflower, or broccoli.
• Avoid taking aspirin or NSAIDs for several days before the test.