Dietary quality is an important factor influencing prediabetes, but few studies have applied the Chinese Diet Balance Index (DBI-16) to evaluate the dietary quality of individuals with prediabetes and explore the associations between dietary quality and prediabetes. In our study, the lower-bound score, higherbound score and diet quality distance, were respectively calculated to assess dietary quality based on each food group. Logistic regression was used to calculate the odds ratio (OR) and 95% confidence interval (95%CI) of unfavorable dietary quality leading to prediabetes in every subgroup. The results were shown that individuals with prediabetes had excessive intake in the categories of cereals, salt and inadequate intake in vegetables, fish and diet variety than participants without prediabetes (all p < 0.01). Unfavourable dietary quality was significantly associated with an increased risk of prediabetes (OR: 1.45, 95%CI: 1.29-1.63), especially among the subjects who lived in rural areas (OR: 1.63, 95%CI: 1.25-1.76), those who had abdominal obesity (OR: 1.58, 95%CI: 1.36-1.85), those who smoked (OR: 1.58, 95%CI: 1.30-1.93), those who consumed alcohol (OR: 1.57, 95%CI: 1.28-1.93) and those who did not drink tea (OR: 1.64, 95%CI: 1.42-1.88). In Conclusion, unfavourable dietary quality was significantly associated with an increased risk of prediabetes.Prediabetes and diabetes have become a serious global problem in recent decades, along with the development of the social economy and changes in people's lifestyles. Prediabetes is characterised by glucose levels that do not meet the criteria for diabetes but that are too high to be considered normal 1 . The International Diabetes Federation (IDF) reported that there were approximately 350 million people with prediabetes worldwide and 48.6 million people with prediabetes in China 2 . People with prediabetes have a high risk of developing diabetes, and 70~90% of individuals with prediabetes will eventually develop diabetes 3 .Dietary quality is an important factor influencing prediabetes and diabetes. Healthier dietary intake can reduce the risk of the progression from prediabetes to diabetes by 40~70% 3 . Among people with prediabetes who changed their dietary model, 40.5% achieved normal glucose tolerance, and their fasting plasma glucose level, body mass index (BMI), glycated haemoglobin (HbA1C) level and blood pressure decreased significantly as well 4 . Therefore, several dietary evaluation indexes have been developed around the world in recent years. In China, researchers mainly use the Diet Balance Index-16 (DBI-16) to assess human dietary quality, and the index was updated based on the latest Chinese Dietary Guidelines and the Chinese Balanced Diet Pagoda 5 . The DBI-16 can be used to evaluate the overall dietary quality mainly through three indicators: the lower-bound score (LBS), higher-bound score (HBS), and diet quality distance (DQD). The LBS represents insufficient intake, HBS represents excessive intake and DQD represents the overall imbalance of the...

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Our study aims to investigate the association between SRH and all-cause mortality, and to investigate whether the SRH-mortality association varies across different socioeconomic status (SES) groups among middle-aged and older Chinese adults. We used data from China Health and Retirement Longitudinal Study (CHARLS), including 11,762 participants for the final analysis. Cox proportional hazards regression was conducted to investigate the association between SRH status and subsequent mortality. There were 724 death events occurred. The results were shown that fair/poor SRH participants tend to die than better SRH peers (HR 1.46, 95% CI 1.12–1.91). The association only occurred in those with rural residency (HR 1.46, 95% CI 1.05–2.04), those who were literate (HR 1.65, 95% CI 1.17–2.33), those with above-average household income (HR 1.95, 95% CI 1.15–3.29) and those working in agriculture and below (HR 1.38, 95% CI 1.02–1.88). In conclusion, worse SRH may be a predictor of all-cause mortality among middle-aged and elderly Chinese, especially in people with rural residency, literacy, above-average household income and working in agriculture and below.