Role of Vitamin D Levels (Serum 25-hydroxyvitamin D) and Cognitive Impairment in the Occurrence of Falls

Summary

Every year, nearly 30% of people aged over 65 fall at least once and about 15% fall at least twice. These falls can have serious consequences that are a significant threat to the independence and well-being of older people. From an economic perspective, the cost of medical care related to falls and resulting injuries is very high and continue to grow with the aging of the population. Therefore falls prevention is a public health priority.

Many data suggest that cognitive, common disorders in the elderly, is a major risk factor for falls and the elderly often have difficulty managing their parallel postural stability and other situations requiring attentional resources. Furthermore, the data used to evoke a role of vitamin D in the risk of falls in the elderly. Indeed, vitamin D has beneficial effects on muscle and on the human brain and several recent studies have shown the existence of positive relationship between serum 25 hydroxyvitamin D and cognitive function. These different actions may explain the beneficial effect of vitamin D supplementation on the risk of falling for practicing daily oral doses of vitamin D in the range of 700-1000 IU.

Our goal in this study is to confirm the existence of a link between vitamin D status and some areas of cognitive functions, and analyze the roles played by vitamin D deficiency and cognitive impairment in the occurrence of falls. The study will also seek the existence of a threshold level of 25-hydroxyvitamin D below which may arise cognitive disorders. The prospective follow-up of patients for 2 years will study the effect of correcting the vitamin D deficiency (initial correction and regular supplementation) on cognitive function, balance, walking and the occurrence of falls.

The study will be conducted in 150 subjects aged 50 years and over and fell in 150 subjects aged 50 and over at risk of falling. These patients will be enrolled in the Emergency Services, Orthopedics, Geriatrics, and Rheumatology of the University Hospital of Caen. All subjects will receive a dose of 25 hydroxyvitamin D, a comprehensive study of cognitive function, tests of balance and walking and assessment of activities of daily living and depression. All the examinations and tests will be carried out during the same half day. According to current recommendations, it will be prescribed a treatment with Vitamin D to subjects with a lowered rate of 25 hydroxyvitamin D (\<30 ng / ml) to normalize the rate and will be advised doctors to prescribe regular supplementation vitamin D in order to maintain it in the standard rate (30 to 80 ng / ml). The effect of the correction of hypovitaminosis D, confirmed by controlling the rate of 25 hydroxyvitamin D, on cognitive functions, balance and walking will be analyzed 3 months and 9 months. During the two years following their inclusion in the study, subjects will be contacted by a phone call every 3 months during which will be recorded any falls they have been victims, as well as changes to their drug treatments, particularly case of regular intake of vitamin D supplementation.

If our hypothesis were true, it would be appropriate to consider a new approach to prevention of fractures involving the correction of vitamin D deficiency, cognitive rehabilitation and cognitive-motor drive in subjects with cognitive impairment.

Conditions

• Accidental Falls

Interventions

OTHER

Measurement of serum 25-hydroxyvitamin D

OTHER

Analysis of global cognitive efficiency score assessed by the "Montreal Cognitive Assessment" (MoCA).

Sponsors & Collaborators

• University Hospital, Caen

  lead OTHER

Eligibility

Min Age

50 Years

Sex

ALL

Healthy Volunteers

No

Timeline & Regulatory

Start

2011-07-31

Primary Completion

2015-12-31

Countries

• France

Study Locations