are a post-menopausal woman and not taking estrogen.

have a personal or maternal history of hip fracture or smoking.

are a post-menopausal woman who is tall (over 5 feet 7 inches) or thin (less than 125 pounds).

are a man with clinical conditions associated with bone loss.

use medications that are known to cause bone loss, including corticosteroids such as Prednisone, various anti-seizure medications such as Dilantin and certain barbiturates, or high-dose thyroid replacement drugs.

have type 1 (formerly called juvenile or insulin-dependent) diabetes, liver disease, kidney disease or a family history of osteoporosis.

have high bone turnover, which shows up in the form of excessive collagen in urine samples.

have a thyroid condition, such as hyperthyroidism.

have a parathyroid condition, such as hyperparathyroidism.

have experienced a fracture after only mild trauma.

have had x-ray evidence of vertebral fracture or other signs of osteoporosis.