Reading health news, as an epidemiologist

Cecile Janssens
Press Pause
Published in
8 min readAug 6, 2020

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When I read news articles about health research, I often wonder what I would have understood if I weren’t an epidemiologist.

I bet it would be similar to reading about topics I know nothing about, like mortgages, hip hop, and string theory.

I would easily believe that what I read is true, especially if the study is large, from a respected university, and published in a respected scientific journal. Written in a respected newspaper. Respected by my own standards, that is.

I imagine that the statistics would read like temperatures in Fahrenheit when Celsius is your scale. I may have little clue what the numbers really mean. Like I have no idea what a reasonable mortgage interest rate is.

Health news articles give a lot of details that hint at the merits and potential pitfalls of the study. But these hints only ring a bell if you’ve seen them before and know how they relate to the strength and weaknesses of scientific studies.

Let me illustrate what I mean.

New York Times, Well, July 29, 2020

May be linked

Last week, the New York Times reported that “severe gum disease and tooth loss may be linked to an increased risk for developing dementia” [italics mine].

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Cecile Janssens
Press Pause

Professor of epidemiology | Emory University, Atlanta USA | Writes about (genetic) prediction, critical thinking, evidence, and lack thereof.