Cost effectiveness of the German screen-and-treat strategy for postmenopausal osteoporosis.

BACKGROUND

The German osteology umbrella organization, Dachverband Osteologie (DVO), has published a new guideline for the secondary prevention of osteoporotic fractures. According to the guideline, women are screened using dual x-ray absorptiometry (DXA). Those with an absolute 10-year fracture risk > or =30% are treated with bisphosphonates such as alendronate or risedronate for 4 years or with teriparatide for 18 months.

OBJECTIVE

To determine the cost effectiveness of the screen-and-treat strategy versus no intervention in women of the general population aged 50-90 years in Germany.

METHODS

Cost-utility and budget-impact analyses were performed from the perspective of the statutory health insurance (SHI). A Markov model with a 1-year cycle length simulated costs and benefits (QALYs), discounted at 3%, over a lifetime horizon. The number of women correctly diagnosed by pre-tests and DXA as having a 10-year fracture risk of > or =30% was estimated for different age groups (50-60, 60-70, 70-80 and 80-90 years). Incremental cost-effectiveness ratios (ICERs) were calculated; all costs are presented in euro, year 2006 values. Robustness of the results was tested by a probabilistic Monte Carlo simulation.

RESULTS

Alendronate was the most cost-effective drug in all age groups; the ICERs were euro 3849, euro 16 589, euro 6600 and euro 2337 per QALY for 50-, 60-, 70- and 80-year-old women, respectively, followed by risedronate. Teriparatide was dominated in every age group. Implementing the screen-and-treat strategy would result in annual costs of euro 175 million for alendronate (euro 181 million for risedronate) or 0.14% of the SHI annual budget. Results were robust in the sensitivity analysis.

CONCLUSION

While the screen-and-treat strategy would result in a substantial cost increase for the SHI, the use of alendronate within such a strategy appears cost effective when compared with many generally accepted medical interventions.