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ObjectiveTo investigate the prevalence and influencing factors of stroke in residents aged 40 years and older in Guangdong province for developing stroke prevention and control policies. MethodsTotally 21 176 permanent residents aged 40 years and older were recruited with multistage random cluster sampling in urban and rural regions of 5 municipalities in Guangdong province for a survey conducted during July – December 2020. All the participants undertook face-to-face interview with a questionnaire designed by domestic experts, physical examination and laboratory tests. Unconditional multivariate logistic regression model was used to analyze influencing factors of stroke. ResultsAmong 16 993 participants surveyed effectively, 361 stroke sufferers were identified and the crude and age-adjusted stroke prevalence were 2 124.40/100 000 and 1 725.25/100 000, respectively. Multivariate unconditional logistic regression analysis revealed following risk factors of stroke among the participants: ≥ 50 years old, smoking, lack of physical activity, family history of stroke, hypertension, diabetes, dyslipidemia, high homocysteine, and atrial fibrillation or valvular heart disease; while, being female and with an individual annual income of 5 000 – 10 000 or more than 20 000 Chinese yuan were protective factors against stroke. ConclusionThe prevalence of stroke was relatively low and influenced mainly by gender, age, annual personal income, smoking, lack of physical activity, family history of stroke, hypertension, diabetes, dyslipidemia, high homocysteine, atrial fibrillation or valvular heart disease among urban and rural residents aged 40 years and older in Guangdong province.

ObjectiveTo examine the prevalence and influencing factors of spirometry examination among residents aged ≥ 40 years in Inner Mongolia Autonomous Region (Inner Mongolia) for promoting prevention and control of chronic respiratory diseases. MethodsUsing multistage stratified cluster and probability proportionate to size sampling and a questionnaire adopted by Chinese Center for Disease Control and Prevention, we conducted a face-to-face survey among 2 400 permanent residents aged ≥ 40 years in four prefectures/banners with chronic obstructive pulmonary disease surveillance project in Inner Mongolia during May – December 2019. The estimated prevalence of spirometry examination in the participants was calculated based on complex sampling weight design; the impact factors of spirometry examination were explored with unconditional multivariate logistic regression analysis. ResultsOf the 2302 participants with eligible responses, 142 reported ever having pulmonary function test. The complicated weighted proportion of spirometry examination was 5.1% for the population surveyed. The results of logistic regression analysis showed that the residents with the education of junior high school and above, being enterprise clerks or professional and technical personnel in enterprises, being workers not classified or being unemployed, being aware of the names of respiratory diseases, ever suffering from respiratory symptoms, and with the history of respiratory illness were more likely to have spirometry examination; while the female residents were less likely to have the examination. ConclusionThe proportion of ever having spirometry examination was relatively low and mainly influenced by gender, education, occupation, the awareness of respiratory disease, respiratory symptoms, and the history of chronic respiratory disease among residents 40 years old and older in Inner Mongolia.

ObjectiveTo explore the association between the detection of chronic obstructive pulmonary disease (COPD) and occupational hazards exposure among permanent residents ≥ 40 years old in Zhejiang province for providing evidence to COPD prevention. MethodsFace-to-face questionnaire interview, anthropometry measurement and pulmonary function test were conducted among 3 004 permanent urban/rural residents aged 40 years and above recruited with stratified multistage random sampling in five counties/prefectures of Zhejiang province during April – December 2019. Unconditional multivariate logistic regression model was applied to analyze the correlation between occupational hazards exposure and the detection of COPD. Results Among the 2 926 participants (51.3% males, 48.7% females) finally included in the analysis, 1 004 (34.3%) and 755 (25.8%) reported having been exposed to occupational dust and harmful gas; the percentages of the participants reporting specific occupational history were 1.6% (48 participants) for coal/mining/quarrying/gas industry, 1.8% (53) for metallurgy/casting/machine manufacturing industry, 3.2% (95) for cement/asbestos/ceramics/glass/graphite produc-tion, 4.1% (119) for engineering/construction engineering/traffic construction, 3.7% (108) for petrochemical/chemical/pharma-ceutical industry, 5.4% (157) for wood processing/furniture processing/house decoration industry, 3.4% (100) for textile/papermaking/cotton/fur processing, 2.2% (63) for dry cleaning/cleaning/cook/porter work, and 18.8% (551) for farm work, respectively. Totally 361 (12.34%) participants were detected as having COPD based on the results of pulmonary function test (forced expiratory volume in one second [FEV1]/forced vital capacity [FVC] < 70%). The results of logistic regression analysis revealed that the participants with farm work history were more likely to have COPD (odds ratio = 1.38, 95% confidence interval: 1.05 − 1.89) after adjusting for sex, age, education, marital status, body mass index and smoking status. ConclusionBeing engaged in farm work may be a risk factor for COPD among residents 40 years old and above in Zhejiang province.