Fall Prevention by Alfacalcidol and Training

The risk of falling increases with age. An impaired renal function is an additional risk factor. Guidelines and systematic reviews suggest, that multimodal interventions are most likely to control this risk. This study evaluates, if patients at high risk for falls will benefit from a multimodal intervention simple and feasible enough to be transferred into general practice. Participants will be randomized either into an intervention group or a control group receiving usual care. The multimodal intervention consists of: * medication: Participants receive 1µg Alfacalcidol and 500mg Calcium daily * mobility program: strength, balance and gait training twice a week for one hour * patient education: a single meeting with teaching lessons on risk factors for falling and modes of fall prevention followed by an evaluation of the individual fall risk and corresponding recommendations to reduce it