The bone evaluation study (BEST): patient care and persistence to treatment of osteoporosis in Germany

Data on fracture frequency and medical care of patients with osteoporosis are still insufficient. We aimed to analyze frequency of osteoporosis-related fractures and multiple fractures, re-fracture rates, treatment prevalence, and persistence to osteoporosis-related medication in Germany.

Using claims data of a state health insurer (2006 - 2009), we performed a retrospective "real world" analysis. Inclusion criteria were age of 50 years or older and an osteoporosis diagnosis or a prescription for defined osteoporosis-related medication. We assessed fractures, frequencies, and the number of multiple fractures per patient as well as time to follow-up fracture and drug persistence using Kaplan-Meier analysis.

Within the observation period, 27% of the osteoporosis patients sustained fractures; of those with fractures, 69% had multiple fractures. For patients with multiple fractures, re-fracture rate after 360 days was between 69% for patients who received parathyroid hormone and 85% for patients who received no anti-osteoporotic medication 360 days before follow-up fracture. In the patient population, persistence rates after 1 year were between 58% for parathyroid hormone and 2% for other osteoporosis-specific drugs (alfacalcidol, fluorides, nandrolone, calcitonin).

In Germany, the number of patients with osteoporosis-attributable fractures is high. There are still deficits in proper treatment as well as in drug persistence. Low persistence lead to a relatively high proportion of patients with follow-up fractures.