What do systematic reviews say?

Intervention not reported

The intervention showed no clear difference in all‐cause Mortality ‐ Flexible sigmoidoscopy (high certainty).

• Flexible sigmoidoscopy versus faecal occult blood testing for colorectal cancer screening in asymptomatic individuals 2013 · Cochrane Headline outcomes only
  RR 0 [0.95, 1.01]
  4 studies · 364827 participants
  High