| Objective To investigate the status of bone mineral density (BMD) and body composition in middle-aged and elderly people in Beijing, and to explore the relationship among BMD, somatometric measurement, and body composition. Methods BMD of 255 older than 40-year-old participants was measured using Metriscan. Meanwhile, body fat and body fat percentage etc. were measured using a body composition analyzer and the somatometric measurement data including body height, weight, and so on, were obtained. Results (1) Taking every 10 years as a division, the participants were divided into divisions. With the increase of age, BMD decreased gradually, especially in women aging from 60 to 69 years old, comparing to that in 50 to 59 years old (P<0.05). BMD was significantly different between the two genders at the same age (P<0.05), and bone health status was worse in females than in males. (2) BMD was positively correlated with body height, body weight, right or left handgrip strength, muscles, lean body weight, protein, and mineral salt, but was negatively correlated with body fat percentage (P<0.01). Conclusion There were close relationship between BMD and body height, body weight, right or left handgrip strength, muscles, lean body weight, protein, and mineral salt. Therefore, they also can be used as indirect reference values to assess bone health status. Lean body weight and muscle are the major determinants of BMD. |