Search resultsRisk factors for low bone mineral density and the 6-year rate of bone loss among premenopausal and perimenopausal women
Title
Risk factors for low bone mineral density and the 6-year rate of bone loss among premenopausal and perimenopausal women
Publication type
Journal Article
Year of Publication
2004
Authors
Journal
Osteoporosis International
Volume
15
Issue
6
Pagination
439 - 446
Date published
2004
ISBN
0937941X (ISSN)
Keywords
Adult, age distribution, alcohol consumption, article, body weight, bone density, Bone loss, bone mineral, breast cancer, Breast Neoplasms, calcium intake, calculation, climacterium, cohort analysis, controlled study, estrogen, Female, femur neck, human, Humans, Longitudinal Studies, lumbar spine, Lumbar Vertebrae, major clinical study, Middle Aged, oral contraceptive agent, osteolysis, Osteoporosis, Postmenopausal, Ovarian Neoplasms, ovary cancer, physical activity, premenopause, priority journal, Prospective Studies, prospective study, risk assessment, risk factor, Risk Factors, scoring system, smoking, sport, Uterine Neoplasms, uterus cancer
Abstract
Risk factors that are associated with lower bone mineral density (BMD) may not necessarily be associated with increased bone loss among premenopausal and perimenopausal women. We determined risk factors for lower premenopausal and perimenopausal BMD while simultaneously determining risk factors for increased 6-year rate of bone loss among women aged 24-50 years within a population-based prospective cohort study. BMD of the lumbar spine and femoral neck, reported as t scores, were measured five times within the 6-year study among 614 women who were between the ages of 24 and 44 in 1992/1993. Rates of bone loss were calculated from the repeated BMD measurements. Risk factors for lower BMD over time at the lumbar spine included history of any fracture (P = 0.005). The major risk factor for lower BMD over time at the femoral neck was family history of osteoporosis (P < 0.002). The major protective factor for greater BMD over time at both skeletal sites was additional body weight (P < 0.0001). Other protective factors for greater BMD over time at the femoral neck were modest alcohol consumption (P = 0.0002) and high-school sports participation (P = 0.002). Risk factors for greater bone loss at either skeletal site included postmenopausal status (P < 0.0001 at the lumbar spine; P = 0.01 at the femoral neck), and the reporting of a reproductive cancer (P < 0.0001 at the lumbar spine; P = 0.0008 at the femoral neck). Body weight was protective against bone loss at both skeletal sites (P < 0.0001). Baseline age, calcium intake, smoking, and current physical activity were not associated with BMD or bone loss. The understanding of the relative importance of risk factors for both low BMD and bone loss may assist in the identification of women at greater risk for subsequent low postmenopausal BMD.