The duration of the treatment with alendronate is not well established. The investigators recruited 228 women with postmenopausal osteoporosis. They all received alendronate during the first 3 years of monitoring and were later on randomized to whether different regimens of intermittent treatment or to carry on 3 years more.
The purpose of this study is to determine the duration of the treatment with alendronate in postmenopausal women with osteoporosis.