Is previous hyperthyroidism still a risk factor for osteoporosis in post-menopausal women?

Hyperthyroidism is a risk factor for osteoporosis, but the relative contributions of the episode of hyperthyroidism and thyroxine replacement for subsequent hyperthyroidism remain uncertain. In this study we have measured bone mineral density (BMD) in post-menopausal women with a previous history of hyperthyroidism, comparing those requiring thyroxine therapy with those remaining euthyroid and with an historical local control population.