Dose-response association: (a) fish and CVD mortality (n = 10, p non-linearity < 0.001; p trend = 0.002); the risk of CVD mortality was decreased by 4% with an increase of 20 g of fish intake (RR = 0.96; 95% CI: 0.94–0.99) per day. (b) marine n-3 PUFA and CVD mortality (n = 8, p non-linearity < 0.001; p trend < 0.001); the risk of CVD mortality was decreased by 4% with an increase of 80 milligrams of marine n-3 PUFA intake (RR = 0.96; 95% CI: 0.94–0.98) per day. CVD, cardiovascular disease; n-3 PUFA, n-3 polyunsaturated fatty acids; RR, relevant risk; CI, confidence intervals; g/d, grams per day; mg/d, milligrams per day.