For all malignant cancers, both fish eaters and vegetarians and vegans combined had significantly lower mortality than regular meat eaters [HR: 0.76 (95% CI: 0.63, 0.91) and HR: 0.82 (95% CI: 0.72, 0.94), respectively]. Vegetarians and vegans combined also had significantly lower mortality than did regular meat eaters for pancreatic cancer [HR: 0.47 (95% CI: 0.26, 0.86); P-heterogeneity = 0.065] and cancers of the lymphatic/hematopoietic tissue [HR: 0.43 (95% CI: 0.27, 0.70)], and low meat eaters had significantly lower respiratory disease mortality than regular meat eaters [HR: 0.69 (95% CI: 0.49, 0.97); P-heterogeneity = 0.14].

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.