[asdfman123]

I thought that too, but then read the second paragraph:

> That finding was independent of other factors thought to influence life's length — such as "socioeconomic status, health conditions, depression, social integration, and health behaviors," the researchers from Boston University School of Medicine and the Harvard T.H. Chan School of Public Health say.

[abecedarius]

"Controlling for Confounders Is Harder than You Think" https://journals.plos.org/plosone/article?id=10.1371/journal...

[ChrisLomont]

That paper is about assessing incremental validity, not every situation regarding confounders.

This paper is not about incremental validity. The above does not apply.

[mensetmanusman]

Hard, but not impossible.