Berkson's Paradox
Two things with nothing whatever to do with each other can look strongly related — purely because of who ended up in the study.
194615 min read
American medical statistics
Joseph Berkson
1899 – 1982
Physician and statistician, head of the division of biometry and medical statistics at the Mayo Clinic for three decades. He coined the term "logit", argued at length against the causal interpretation of the early smoking–cancer studies, and in 1946 described the selection artefact in hospital data that now bears his name.