“…All the potential covariates were considered in this study to observe the influent power of dietary factor to HUA. (1) Genders; (2) Residence locations were categorized into urban and rural by region codes (100- for urban and 200- for rural) prescribed by the National Bureau of Statistics; (3) Geographic regions (east, central and west) were defined by National Bureau of Statistics, where east areas included Beijing, Tianjin, Hebei, Liaoning, Shanghai, Jiangsu, Zhejiang, Fujian, Shandong, Guangdong, Hainan, Central areas included Shanxi, Jilin, Heilongjiang, Anhui, Jiangxi, Henan, Hubei, Hunan, and West areas included Inner Mongolia, Guangxi, Chongqing, Sichuan, Guizhou, Yunnan, Tibet, Shaanxi, Gansu, Qinghai, Ningxia, and Xinjiang; (4) Participants were divided into four age groups: 18–29 years, 30–39 years, 40–49 years and 50–64 years; (5) Education level was categorized as low (primary school or below), moderate (junior school) and high (high school or above); (6) According to the annual income of household, four groups were established by conception of middle-level income persons and classification standard in China: low (<65,141.7 CNY), moderate (65,141.7–193,494.9 CNY), high (>193,494.9 CNY) and unknown/unclear; (7) Body mass index (BMI) was categorized as underweight (BMI < 18.5), normal (18.5 ≤ BMI < 24.0), overweight (24.0 ≤ BMI < 28.0), and obese (BMI ≥ 28.0) [ 26 ]; (8) Smoking was classed as never smoked, formerly smoked or currently smoke; (9) Physical activity status was decided based on weekly total metabolic equivalent (MET) and total weekly duration of different exercise levels: insufficient (MET < 600), sufficient (600 ≥ MET) [ 27 ]; (10) Diabetes mellitus was diagnosed according to the ADA 2010 criteria (FPG level ≥ 7.0 mmol/L and/or HbA1c concentration ≥ 6.5%) [ 28 ]; (11) According to the guidelines of Chinese adult dyslipidemia prevention and treatment (2016 revised edition), those with total cholesterol ≥ 6.2 mmol/L or triglyceride ≥ 2.26 mmol/L or LDL ≥ 4.14 mmol/L or HDL < 1.04 mmol/L were considered as dyslipidemia [ 29 ]; (12) Hypertensive was identified in those whose mean systolic blood pressure was ≥ 140 mmHg and/or mean diastolic blood pressure ≥ 90 mmHg and/or received antihypertensive medicine within two weeks [ 30 ]; (13) Vegetarian was the consumer of plant-based diet with no dairy products and eggs intake.…”