Journal
JOURNAL OF BONE AND MINERAL METABOLISM
Volume 32, Issue 1, Pages 48-55Publisher
SPRINGER JAPAN KK
DOI: 10.1007/s00774-013-0463-8
Keywords
Fracture incidence; Bone mineral density; Chinese women
Funding
- Hong Kong Research Grant Council [HKU 768610M]
- Seed Funding for Basic Research, Osteoporosis and Endocrine Research Fund
- KC Wong Education Foundation
- Bone Health Fund of The University of Hong Kong
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Population-based studies have revealed a decline in the incidence of age-adjusted hip fractures in southern Chinese women during the past decade. To determine whether there was a secular change in population characteristics that accounted for this decline, we compared the bone mineral density (BMD) and lifestyle habits of two cohorts of women who were more than 50 years of age and who were recruited from 1995 to 2000 and 2005 to 2010. The BMD levels in the 2005-2010 cohort were significantly higher at the spine and hip and ranged from 3.6 to 17.8 % among the different age groups. Additionally, a significantly lower prevalence of subjects with osteoporosis and osteopenia was observed. Longer reproductive years, higher levels of physical activity, higher estradiol and 25(OH) vitamin D levels, and lower alkaline phosphatase levels were found in the 2005-2010 cohort. After adjusting for bone-determining factors, significant differences were detected in the BMD levels at the lumbar spine, femoral neck, and total hip (4.17, 9.02, and 9.34 %, respectively) in women > 50 years of age but not in women a parts per thousand currency sign50 years of age. The secular increase in BMD and healthier lifestyles most likely led to the decline in the incidence of age-adjusted fractures.
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