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A secular increase in BMD in Chinese women
Elaine Cheung1, Cora Bow, Connie Loong
1Department of Medicine, The University of Hong Kong and Queen Mary Hospital, Hospital Authority, Hong Kong, China.
Journal of Bone and Mineral Metabolism
|May 3, 2013
Summary
Southern Chinese women show improved bone mineral density (BMD) and healthier lifestyles, leading to fewer hip fractures. This study compared BMD and lifestyle factors in two cohorts over 15 years.
Area of Science:
- Gerontology
- Orthopedics
- Public Health
Background:
- Population-based studies indicate a recent decline in age-adjusted hip fracture incidence among southern Chinese women.
- Secular changes in population characteristics may influence fracture rates.
Purpose of the Study:
- To investigate secular changes in bone mineral density (BMD) and lifestyle factors contributing to the hip fracture decline.
- To compare BMD and lifestyle habits between two cohorts of women aged over 50.
Main Methods:
- Comparative analysis of two cohorts of women (1995-2000 vs. 2005-2010).
- Measurement of bone mineral density (BMD) at the spine and hip.
- Assessment of lifestyle factors including reproductive years, physical activity, and hormone levels.
Main Results:
- The 2005-2010 cohort exhibited significantly higher BMD (3.6-17.8%) at the spine and hip compared to the earlier cohort.
- Lower prevalence of osteoporosis and osteopenia was observed in the later cohort.
- Healthier lifestyle factors, including longer reproductive years, increased physical activity, and higher vitamin D levels, were prevalent in the 2005-2010 cohort.
Conclusions:
- A secular increase in BMD, coupled with healthier lifestyle choices, is strongly associated with the observed decline in hip fractures in southern Chinese women.
- These findings highlight the importance of lifestyle interventions in mitigating osteoporosis and fracture risk in aging populations.
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