“Short people have higher heart risk” screams the headline on CNN.com, treating it as a statement of fact.
“Shortness Boosts Heart Disease, Death Risk” is the headline in a HealthDay story seen on BusinessWeek.com. Wrong.
Such a study as the one being described can only establish association; it CANNOT prove causation. So it is wrong to say short people have higher risk. It is wrong to say shortness boosts risk.