On: Are colonoscopies worth it?

[Nevermark]

Any self-selection where higher risk individuals opt-in more, increases benefit/cost ratios.

That seems like a pro invitation argument. (I.e. pro treatment for the invited + opt-in cohort.)

[rocqua → Nevermark]

But alternative screenings with a wider acceptance could have a higher 'benefit-cost' for a lower 'benefit/cost'.