A report by Donald McNeil on how eating fish can ward off strokes. It cites a comment by Dr. Martha L. Daviglus, who draws attention to the the health habits of those who ate fish five times a week, saying

Fish eaters are a very different kind of people. Look, they smoke less, they eat more food, they eat many more fruits and vegetables. Fish could just be a marker for how healthy you are.

She must mean "more kinds of food."