Paul Appleby said this quote

For specific causes of death, compared with regular meat eaters, low meat eaters had ~30–45% lower mortality from pancreatic cancer, respiratory disease, and all other causes of death, fish eaters had ~20% lower mortality from malignant cancer and ~20% higher circulatory disease mortality, and vegetarians and vegans had ~50% lower mortality from pancreatic cancer and cancers of the lymphatic/ hematopoietic tissue. These findings were essentially unchanged on further adjustment for BMI, and generally were robust across categories of sex, smoking, and BMI for the 6 most common causes of death.