[Shandong hilly rural natural population cohort study: method and baseline characteristics of survey subjects].

Objective: To understand the study method and the baseline characteristics of the survey subjects of Shandong hilly rural natural population cohort study, and provide reference for the research of the prevalence and risk factors of common chronic and non-communicable diseases. Methods: Baseline survey, including questionnaire survey, physical examination, biochemical index examination and blood and saliva collection, was conducted in local residents aged 20-79 years in Kongcun and Xiaozhi townships of Pingyin county, Shandong province, from 2017 to 2019. Shandong hilly rural natural population cohort was established and main baseline characteristics of the study subjects were statistically analyzed. Results: A total of 10 296 study subjects aged 54.45 years were included in the study, in whom 40.6% were males. Among the study subjects, 88.3% had education level of junior high school or below, 62.1% were famers, and 90.7% were married. Smokers accounted for 45.6% of men and 0.9% of women, and drinkers accounted for 65.8% of men and 3.0% of women, respectively. The self-reported rates of hypertension, diabetes, coronary heart disease, stroke and tumors were 19.8%, 3.2%, 2.8%, 2.7% and 1.2%, respectively. Conclusion: The Shandong hilly rural cohort natural population study provided important evidence for assessing the risk for common chronic and non-communicable diseases and disease prevention and control in hilly rural areas.

Magnitude and temporal trend of acne vulgaris burden in 204 countries and territories from 1990 to 2019: an analysis from the Global Burden of Disease Study 2019.

BACKGROUND: Acne vulgaris is widespread across the world. Mapping the latest magnitudes and temporal trends of acne vulgaris provides the essential foundation for targeted public policies at the national, regional and global levels. OBJECTIVES: In compliance with the framework of the Global Burden of Disease Study 2019, this study aimed to summarize the incidence, prevalence, DALYs and the corresponding secular trends of acne vulgaris by sex and age group in 204 countries from 1990 to 2019. METHODS: The average annual percentage change was calculated to depict the temporal trends in age-standardized rates (ASRs) of acne vulgaris burden by region, sex and age. RESULTS: Globally, it was estimated that there were 117·4 million [95% uncertainty interval (UI) 103·0-133.7] incident cases of acne vulgaris, 231·2 million (95% UI 208·2-255·5) prevalent cases and 5·0 (95% UI 3·0-7·9) million DALYs, with an increase of approximately 48% compared with 1990. Moreover, the overall ASRs of acne vulgaris increased by approximately 0·55% annually over the past three decades. We observed large disparities in ASRs of acne vulgaris with changing trends in sex, location and age. The ASR of acne vulgaris among women was around 1·3 times that of men, but the sex difference was narrowed because of the pronounced increase among men. The ASRs of acne vulgaris were higher in high-income regions, but the increasing trend was more pronounced in other regions. CONCLUSIONS: The burden rate of acne vulgaris continues to increase in almost all countries. Understanding the specific characteristics of acne vulgaris burden is essential to formulate more effective and targeted interventions for controlling acne burden.