Tehran University of Medical Sciences Iranian Journal of Public Health 2251-6085 54 11 2025 11 28 2454 2462 Yang Chen Department of Hospital Quality Evaluation and Medical Record Management, the Third People’s Hospital of Chengdu, Chengdu, China Xinmei Yang School of Public Health and Health Management, Fujian Health College, Fuzhou, China 2024 04 05 2025 08 10 Background: Overweight and obesity have turned into a substantial public health crisis worldwide. We aimed to estimate the prevalence and risk factors of overweight and obesity. Method: Data collected from the China Health and Nutrition Survey (CHNS) from 1993 to 2015, including 75,559 adults. We used linear-by-linear trend tests, logistic models, and Cox regression models to test the relationship between the prevalence of overweight and obesity and blood pressure. Results: From 1993 to 2015, the prevalence of overweight and obesity increased from 34.94% to 69.63%, and the prevalence of females was higher than that of males. Cox regression analysis showed that systolic pressure (SBP) <140 and diastolic pressure (DBP) <90 was associated with a lower prevalence in participants. Compared by both age and gender, SBP and DBP were risk factors for the prevalence of overweight and obesity. Conclusion: Higher DBP and SBP were associated with a higher risk of overweight and obesity. When developing blood pressure control strategies, comprehensive consideration should be given to population demographics, with an emphasis on promoting individualized intervention approaches. https://ijph.tums.ac.ir/index.php/ijph/article/view/35094 https://ijph.tums.ac.ir/index.php/ijph/article/download/35094/8705