What you said about cognitive ability as indicator of health over time reminds me of this paper by Reeve & Basalik, "Is health literacy an example of construct proliferation? A conceptual and empirical evaluation of its redundancy with general cognitive ability". What they showed is that the tests typically used to measure health literacy is a good proxy for intelligence, despite not being intended to be so. The fact that health literacy is such a strong predictor at maintaining health over time, and even seen as a tool for reducing health inequalities. If literacy is best conceptualized as intelligence rather than knowledge, the interpretation is now very different.
What you said about cognitive ability as indicator of health over time reminds me of this paper by Reeve & Basalik, "Is health literacy an example of construct proliferation? A conceptual and empirical evaluation of its redundancy with general cognitive ability". What they showed is that the tests typically used to measure health literacy is a good proxy for intelligence, despite not being intended to be so. The fact that health literacy is such a strong predictor at maintaining health over time, and even seen as a tool for reducing health inequalities. If literacy is best conceptualized as intelligence rather than knowledge, the interpretation is now very different.
I'll take a look at the paper thanks!