Paul Saladino· MD
in an observational study there is no intervention other than a survey you're watching people over time but there's nothing being done you're asking them how many eggs do you eat for breakfast how much kale do you eat for breakfast how many salads do you eat how much walking do you do how much time in the sun do you spend um you know all these things do you do you sleep eight hours a night and then and then you're either following them prospectively or you're looking back retrospectively you can go back in time or forward in time and you're looking at Health outcomes and you can only draw a correlation and anytime you have that word correlation or Association you have to kind of be a little skeptical and think Hmm I can't draw a positive inference I correlation is never causation