On the other side, an open randomised study of a single annual injection of 150.000±300.000 IU of vitamin D each autumn in an elderly Finnish population showed a significant reduction in overall fracture rate but not in the rate of hip
fracturesThus, the problem whether vitamin Dsupplementation alone is able to prevent hip fracture remains unresolved. Nevertheless, all these studies underline the need for an adequate vitamin D and calcium nutrition in the elderly, particularly in populations at risk of osteoporotic fractures like individuals living indoors in nursing homes, who have a high prevalence of vitamin D deficiency or insufficiency.