Tehran University of Medical Sciences Iranian Journal of Public Health 2251-6085 50 10 2021 10 03 2010 2016 Yuguang Zhao School of Public Health, Qiqihar Medical University, Qiqihar 161006, China Jinhui Li Department of Sports Rehabilitation, College of Physical Education, Qiqihar Medical University, Qiqihar 161006, China Zhigang Yuan Department of Volleyball Theory and Teaching Method, Physical Education and Training Institute, Harbin Institute of Physical Education, Harbin 150001, China Xin Li Department of Physical Education, Qiqihar Medical University, Qiqihar 161006, China Hanghai Gu Qiqihar Federation of Literary and Literature, Qiqihar 161000, China Chuanming Jiao Department of Physical Education, Qiqihar Medical University, Qiqihar 161006, China Zhong Zhang Department of Physical Education, Qiqihar Medical University, Qiqihar 161006, China 2021 06 08 2021 08 02 Background: To investigate the relationship between different dietary patterns and the levels of bone mineral density (BMD) in middle-aged and aged people, and to provide references for the nutritional prevention of osteoporosis. Methods: A total of 476 residents aged 45 yr or more in Qiqihar City were enrolled from Aug 2018 to Feb 2019. They took a Food Frequency Questionnaire for dietary survey. Their dietary patterns were analyzed using the factor analysis method, and BMD were detected using ultrasound bone densitometer, to explore the relationship between different dietary patterns and BMD levels. Results: Four dietary patterns were obtained in the survey: relatively balanced, oil-salt, milk-tuber, and aquatic. Among them, the prevalence of osteoporosis reached 21.8%. High-level relatively balanced dietary pattern (OR=0.588, 95%CI= 0.363-0.951) and high-level dairy-potato food dietary pattern (OR=0.668, 95%CI= 0.370-0.983) were associated with lower risk of osteoporosis. Conclusion: A balanced diet and a high intake of dairy-potato food dietary pattern were associated with a lower prevalence of osteoporosis. It is recommended that middle-aged and aged people should have a balanced diet with more dairy products and potatoes to protect bone health. https://ijph.tums.ac.ir/index.php/ijph/article/view/25223 https://ijph.tums.ac.ir/index.php/ijph/article/download/25223/7378