BMD testing: one and done

Are repeat bone mineral density tests necessary to identify women who are susceptible to fracture?

Rechecking bone mineral density (BMD) after 3 years does not add additional prognostic information. In other words, not much changes in 3 years with regard to estimating fracture risk and, presumably, need for treatment, so serial testing is not useful. Another study found similar results in older patients, and, similarly, a third study found that BMD monitoring is not necessary after starting treatment with a bisphosphonate.