The burden of all cause death attributed to dietary risks in Iran based on joinpoint regression analysis from 2000 to 2021

A suboptimal diet is a key preventable risk factor for many diseases. This study aimed to evaluate the burden of all-cause death attributed to dietary risks in Iran. We used the Global Burden of Disease data to estimate the temporal trends of age-standardized rates of years of life lost (YLLs) and years of healthy life lost due to disability (YLDs) due to diet-related factors from 2000 to 2021, segmented by sex and province in Iran. Join point regression was used for these analyses. The trend analysis indicated that the highest average annual percent change (AAPC) of YLDs for dietary risks in women was attributable to high red meat consumption (3.8, 95% UI; 3.7, 3.9) and in men was attributable to a low intake of nuts and seeds (-3.3, 95% UI; -3.4, -3.2). The highest AAPC of YLLs for dietary risks in women (-5.7, 95% UI; -5.8, -5.6) and men (-5.42, 95% UI; -5.54, -5.26) were attributable to low intake of nuts and seeds. The highest rate of diet-related YLDs was in Khuzestan (264 per 100,000) and Khorasan-e-Razavi provinces (262 per 100,000) for women and men, respectively. Golestan province had the highest rate of diet-related YLLs in women (2043 per 100,000) and men (3059 per 100,000). This research provides a detailed overview of how dietary risks could affect disease burden. Highlights the importance of the need for evidence-based nutritional policies aimed at improving dietary quality, reducing disease risk in Iran.