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Virgin olive oil is more expensive. The most important confounding factor in observational research is socioeconomic status - rich people live longer than poor

Virgin olive oil is more expensive. The most important confounding factor in observational research is socioeconomic status - rich people live longer than poor people. This research attempted to control for it in a limited fashion, but that's not enough.

girvo 4y ago
Though the price difference is quite a lot less pronounced in Spain, where the study was done.