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Osteopenia is a condition in which bone mineral density is lower than normal. It is considered by many doctors to be a precursor to osteoporosis. However, not every person diagnosed with osteopenia will develop osteoporosis. More specifically, osteopenia is defined as a bone mineral density T-score between â1.0 and â2.5.
The percentage of women who have osteopenia (a bone density that is somewhat low) depends on age and race and use of hormones. By definition, 16% of white women aged 20-29 have osteopenia, and less than 1% have osteoporosis. Currently about 38% of women aged 65 have osteopenia and 20% have osteoporosis.