Related, I was told by a doctor to get screened after turning 50. But a reasonable self-estimate given all my risk factors puts my chances of having colon cancer at 1 in 10000. A colonoscopy has a false positive of ~2%[0] for my demographic. Meaning if I get a positive result, it's actually ~200 times more likely that I don't have cancer. It's hard to justify a screening given those odds and the 99%+ chance I will waste my time treating and worrying about a disease I don't have. My guess is an insurance company wouldn't cover a colonoscopy for those reasons.
[–] nostrademons 1 day ago
[–] bestouff 11 hours ago
[–] officeplant 1 day ago
Tested at 37, because occasional bloody stool. Found a few polyps but no cancer. Still had to fight with insurance to keep my costs below $2500 for the whole experience. Still upset the doctor thought I was joking when I requested a DVD or Memory stick with the tour of my insides on it.
The link you give is for colon cancer blood tests. Colonoscopies themself are basically definitive, because if they see something suspicious they will snip it and send it to the lab for biopsy. I had one such "suspicious polyp" and it turned out it wasn't a polyp at all, just normal intestinal tissue they mistook. There's your false positive. But the risks and long-term consequences are basically nil, the intestine heals itself in a week or two.
It's a very unpleasant procedure (the prep, not the procedure itself), but it's also very low risk and effective at catching colon cancer cases early when they can still be treated.