[Deaths and life expectancy losses attributable to diet high in sodium in China]

Objective: To quantitatively estimate the deaths and life expectancy losses attributable to diet high in sodium in China, and examine the gains and shifts under different control scenarios of sodium consumption. Methods: Based on data from the cause-of-death through the National Mortality Surveillance System, and 24 hours urinary sodium values from Global Burden of Disease study on Chinese's estimates, population attributable fractions with the framework of comparative risk assessment were used to analyze the deaths and life expectancy losses due to diet high in sodium. The same methods were followed to examine the gains and shifts under different control scenarios of sodium consumption. Results: In 2013, 1 430 (940 for men and 490 for women) thousand deaths were attributable to diet high in sodium, accounting for 15.6% (17.4% for men and 13.0% for women) of all-cause deaths in China, which causing 2.17 (2.49 for men and 1.71 for women) years of life expectancy loss. Diet with high sodium in 2013 caused 1 200, 50 and 180 thousand deaths from cardiovascular disease, chronic kidney disease and stomach cancer respectively, accounting for 31.5%, 30.8% and 64.8% of those specific causes. Comparing to the baseline in 2013, if the targets of 10% decrease of sodium consumption by 2020 and 15% by 2030 for Chinese chronic disease prevention and treatment planning, and 30% decrease by 2030 for WHO non-communicable disease monitoring framework are achieved, 220, 340 and 730 thousand deaths will be averted, which may gain 0.30, 0.45 and 0.95 years of life expectancy, respectively. Conclusions: As one of the leading risk factors, diet high in sodium had caused heavy burden of disease from cardiovascular disease, chronic kidney disease and stomach cancer on Chinese residents. Intervention programs on sodium-reduction are urgently needed in China and related cost-effectiveness is highly expected.