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It is generally believed that osteoporosis increases the risk for fractures from low trauma (falls from a standing height or less) but not from high trauma (motor vehicle accidents and falls from greater than standing height). In two national prospective cohort studies assessing this issue, approximately 8000 women were followed for 9 years, and 6000 men were followed for 5 years (mean age, about 74 in both cohorts).
A total of 264 women and 94 men reported first-incident high-trauma fractures, and 3211 women and 346 men reported first-incident low-trauma fractures. In analyses adjusted for age, body-mass index, exercise, prior fractures, chronic medical conditions, and treatment for osteoporosis, a 1-standard deviation decrease in bone-mine…