There’s been a very effective long term marketing campaign on behalf of colonoscopy – which is not the only colon cancer screening option. In fact, the US Preventive Services Task Force says the options – fecal occult blood testing, sigmoidoscopy, and colonoscopy - each have risks and benefits that vary – in its screening recommendation for adults ages 50-75.
A common line now is, “The best colon cancer screening option is the one that’s used.”
In that regard, an inexpensive home stool test kit that can be mailed in holds some obvious public health advantages over a several hundred dollar colonoscopy test that requires some less than pleasant bowel prep, an office visit, and a procedure that carries some risk.
Yet, in many media discussions – news stories for today’s discussion – colonoscopy gets the preferential treatment. Witness the news coverage of two studies in the New England Journal of Medicine this week.
None of these stories mentioned another study in the same journal reporting the potential benefits of fecal occult blood stool testing. Why? What leads a news organization to peruse a journal and report on one study in it but not another? When you go on the New England Journal of Medicine website, both studies are highlighted right at the top.
Oddly, DailyRx.com, cited in the last bullet above, also posted another story, “Easiest Form of Colorectal Cancer Screening Worked,” regarding the stool test study, but without linking the two stories.
Some news organizations appropriately mentioned both studies. Examples:
At the other end of the spectrum, Minnesota Public Radio, perhaps because the blood stool test study came out of the Minnesota Colon Cancer Control Study, reported only on the fecal occult blood test study, “Stool card proves to be effective cancer screening tool.” Excerpt:
“At the moment I think the best test is the one that gets done,” said (the study’s lead author). “It has a lot of advantages in being inexpensive, readily available and carries no harms. So this might be a very good option for individuals to undergo. And if it’s positive they would get a colonoscopy. But if it’s negative they could get stool cards every year.”
Addendum: a short while later, MPR reporter Lorna Benson responded to my email question, writing:
“The local research angle was a factor, but that wasn’t the main consideration.
I thought it was remarkable that the benefit of the fecal occult-blood test screening appears to last so long (a reduction in the risk of death of up to 32 percent, for as long as 30 years in some cases). That is great news for a test that is widely available, relatively inexpensive and not harmful. That’s what made the story newsworthy in my opinion.
And of course the study design appeared strong. The follow-up had a large number of mortality events (more than 33,000 deaths). And the original trial it was based on was randomized. Also, the findings were consistent with previous, shorter-term research (which added some confidence to the interpretation).”
Uneven news coverage is just one factor in the uneven public dialogue about colon cancer screening options. We’ve written about it before:
As we suggest often on this website, we must do a better job in educating the American public about screening tests and the tradeoffs involved in each.
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