[superqd]

I just think there is far too much noise in this sort of study to draw any sort of conclusion. An effect has to be very strong to manifest in such noise. Yeah, if the difference in life expectancy was 3 decades, say, then perhaps it would show in such noise.

[didibus]

What do you consider the "noise" here? That people would inaccurately assess if they were eating low-carb or not?