3 ms·
The short answer, unless I'm mistaken, is that the trial didn't measure the effectiveness of colonoscopies. It measured the effectiveness of being invited to ha
by Veuxdo 4y ago
The short answer, unless I'm mistaken, is that the trial didn't measure the effectiveness of colonoscopies. It measured the effectiveness of being invited to have a colonoscopy. That plus "ten years of follow-up is a relatively short period of time for colorectal-cancer development", per a source in the article.
- oldgradstudent 4y agoHow would you design such a trial? You cannot force people to undergo a colonoscopy. But if you just compare the people who SELF SELECTED themselves to undergo the trial then you introduce the biases that you attempted to overcome by using a randomized controlled trial.