Summary of recommendations for screening for colorectal cancer (grade of recommendation)
| Guideline | Canadian Task Force on Preventive Health Care, 20017 | Canadian Task Force on Preventive Health, current | US Preventive Services Task Force; draft, 201528 | |||
|---|---|---|---|---|---|---|
| Age group and recommendation | > 50 yr | Screen | 50–59 yr | Screen (weak) | 50–75 yr | Screen (grade A) |
| 60–74 yr | Screen (strong) | 76–80 yr | Conditional screen (grade C) | |||
| > 75 yr | Do not screen (weak) | |||||
| Modality and interval | gFOBT or FIT | Every 1 or 2 yr (grade A) | gFOBT or FIT | Every 2 yr | gFOBT or FIT | Every year |
| Flexible sigmoidoscopy | Every 5 yr | Flexible sigmoidoscopy | Every 10 yr | Flexible Sigmoidoscopy | Every 10 yr plus FIT every year | |
| Colonoscopy | Insufficient evidence to include or exclude (grade C) | Colonoscopy | Do not recommend | Colonoscopy | Every 10 yr | |
Note: FIT = fecal immunochemical testing, gFOBT = guaiac fecal occult blood testing.