Objective: To investigate the awareness of occupational health knowledge among workers in key industries in a district of Beijing Municipality, so as to provide the evidence for formulating occupational health knowledge propaganda and interventions. Methods: A total of 1 562 workers were randomly sampled using a stratified cluster random sampling method from 10 large-size, medium-sized, small-sized/micro enterprises in the second industry in a district of Beijing Municipality. Participants' basic characteristics and awareness of occupational health knowledge were collected using the Chinese National Occupational Health Literacy Monitoring Questionnaire Among Key Populations, and the awareness of occupational health knowledge was analyzed. Results: Totally 1 562 questionnaires were allocated, and 1 479 valid questionnaires were recovered, with an effective recovery rate of 94.69%. There were 821 respondents from large-sized enterprises (55.51%), 307 from medium-sized enterprises (20.76%) and 351 from small-sized/micro enterprises (23.73%), and 513 respondents from 4 furniture manufactures (34.69%) and 966 from 6 automobile manufacturers (65.31%). The respondents included 1 148 men (77.62%). The awareness of occupational health knowledge was 80.53%, with 79.42% in men and 84.73% in women, and was 67.53%, 85.05%, 80.08% and 78.22% among workers with educational levels of primary school and below, junior high school, high school/vocational high school/technical secondary school and junior college and above, 76.05%, 81.67%, 81.37% and 80.86% among workers at ages of 18 to 29, 30 to 39, 40 to 49 and 50 to 69 years, 78.79%, 81.65%, 79.17% and 83.96% among workers with working duration of 3 years or less, >3 to 6 years, >6 to 10 years and longer than 10 years, and 93.37% and 74.90% among workers from furniture and automobile manufacturers, respectively. There were gender-, educational level-, age-, working duration- and industry-specific awareness rates of occupational health knowledge among workers (all P<0.05). Conclusions The awareness of occupational health knowledge among workers in key industries from a district of Beijing Municipality fail to reach the target set in the 14th Five-Year Plan for Occupational Health Control in China and Beijing Municipality. Workers' gender, educational level, age, working duration and industry may affect the awareness of occupational health knowledge, and targeted health education requires to be reinforced.

Objective: To investigate the incidence of occupational diseases in a District of Beijing, from 2004 to 2017 and to analyze the distribution characteristics and incidence trends of occupational diseases. Methods: The data of confirmed occupational disease cases data in the occupational disease and occupational health information monitoring system in a district of Beijing from 2004~2017 were collected to analyze the incidence and trends of occupational diseases. Results: In 2004~2017, a total of 161cases of occupational diseases were reported in a district of Beijing, mainly pneumoconiosis (113 cases, 70.19%) . The average age of onset of pneumoconiosis was (51.65 ±11.10) years old, and the average age of dust exposure was (13.14±8.07) years, mainly including silicosis accounting for 85.84%, concentrated in small collective enterprises. Pneumoconiosis was mainly female, with 80 cases accounting for 70.80% of the disease; most of the working years were 10-20 years, the age of onset of dust pneumoconiosis and the duration of dust exposure were statistically different (P<0.05) ; The distribution of pneumoconiosis industry was concentrated on the manufacture of jewellery and related articles in 91cases (80.53%) , Compared with the non-jewellery and related articles manufacturing industry, the average age of onset were statistically significant (P<0.05) . Occupational diseases other than pneumoconiosis were mainly male; occupational ear, nose and throat (ENT) and oral disease male accounted for 86.96% of the disease, mainly concentrated in small enterprises, state-owned enterprises, the majority of working years wereconcentrated in 20~30 years; occupational infectious diseases accountded for 93.33% of the disease, mainly concentrated in small collective enterprises, most of the working years were less than 10 years. Conclusion Occupational diseases in a district of Beijing are mainly pneumoconiosis, mainly in small collective enterprises, mostly historical issues, the number of reports of occupational ENT and oral disease and occupational infectious diseases are increasing, it is important to strengthen supervision and protect the health of workers.