Comment by thaumasiotes
16 hours ago
> I find that when I point this out, people often get mad. They feel they aren't obese. But the research doesn't support them, if you are anywhere outside of the "healthy" categorization you are at the same risk (that we know of so far) as "clinically obese" people.
Depends. All cause mortality is notoriously lower for "overweight" people than "normal weight" people.
Really smells like one of those “some alcohol is healthier than none” things where there’s a subset of the otherwise-healthiest group that’s in the otherwise-healthiest group because they’re very sick.
Normal weight and overweight were determined by percentage of population at some point. The boundaries are not about lifespan, they never were.
Why? "Overweight" and "normal weight" weren't determined by reference to what's better.
A big 30-year Danish study that seems to be one of the main ones referenced for this purpose sure appears to be doing exactly what I worried it was: measuring the predictive power of BMI for mortality, not the healthiest weight for someone to maintain, which are different things. I see nothing in the abstract & methods about correcting for sick people tending to lose weight, and the healthiest BMI creeping up over time as mean population BMI increased, plus the U-shaped mortality curve, really do look like what you’d expect to see if they’re not accounting for that.