[EstanislaoStan]

So it's not just that people who go outside more are generally healthier: "Solarium users were also at a lower risk of non-CVD/non-cancer mortality."

[sokoloff]

I would wager that there's a positive covariance between "solarium users" and "not poor" where "not poor" is surely correlated with lower mortality.

[_xiaz]

I'd love if more studies accounted for this. It's the "Mozart makes your kids smart" mistake repeated ad nauseam