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RELATIONSHIP BETWEEN VITAMIN D AND PHYSICAL PERFORMANCE IN COMMUNITY DWELLING ELDERLY MEN


V Środkowo Europejski Kongres Osteoporozy i Osteoartrozy oraz XVII Zjazd Polskiego Towarzystwa Osteoartrologii i Polskiej Fundacji Osteoporozy, Kraków 29.09-1.10.2011

Streszczenia:
Ortopedia Traumatologia Rehabilitacja 2011, vol 13 (Suppl. 1). str 106


P02

RELATIONSHIP BETWEEN VITAMIN D AND PHYSICAL PERFORMANCE IN COMMUNITY DWELLING ELDERLY MEN 

Strazdiene V.2, Tamulaitiene M.1,3, Mastaviciute A.1,3, Alekna V.1,2

1Vilnius University, Faculty of Medicine, Vilnius, Lithuania

2State Research Institute Centre for Innovative Medicine, Vilnius, Lithuania

3National Osteoporosis Center, Vilnius, Lithuania

Keywords: vitamin D, short physical performance battery, elderly men
 

Introduction. Vitamin D deficiency is common in the elderly population and is associated with poor physical performance. Vitamin D may have attribute to muscle strength through a highly specific nuclear receptor in muscle tissue.

Aim: To investigate the association between vitamin D level and physical performance in older men.

Materials and methods. This was a pilot cross-sectional study on community dwelling men aged 60 years and more who visited National Osteoporosis Center in Vilnius, Lithuania. Serum vitamin D was measured by automated immunoassay (Cobas E411, Roche Diagnostic). The standard threshold was used for vitamin D levels of optimal (≥30 ng/ml), insufficient (20-29 ng/ml), deficient (<20 ng/ml), severe depletion (<10 ng/ml). Physical performance was assessed by the short physical performance battery (SPPB). The SPPB consists of standing balance tasks, five repeated chair stand test and the 4-m walk test. Each of the three performance components were measured in seconds and a score ranging from 0 to 4 was assigned. The sum of three scores composed the total SPPB score ranging from 0 to 12. Statistical analysis was carried out using SPSS version 18.0 for Windows. Pearson correlation coefficient was used to evaluate the relationship between variables. Significance level was defined as 0.05.

Results. A total of 115 men with a mean age 72.1 ± 6.8 years were investigated. Age was statistically significantly negatively associated with the total score of SPPB (Pearson correlation coefficient = -0.3; p = 0.02), and no association was observed between age and vitamin D level. Optimal level of serum 25(OH)D was found in 7 (6.1%) subjects. Thirty four men (29.5%) had vitamin D insufficiency, 47 subjects (40.9%) – deficiency and 27 men (23.5%) had vitamin D severe depletion. Highest SPPB score (10.3 ± 1.6) was in subjects with optimal vitamin D level, and lowest (9.3 ± 1.9) – in severe vitamin D depletion. There was no statistically significant correlation between vitamin D level and total SPPB score. Each of three short physical performance battery components was analyzed separately. The vitamin D level showed an inverse association with time to complete five repeated chair stand test only in vitamin D deficient subjects (r = -0.3; p = 0.05).

Conclusions. The serum vitamin D was statistically significantly negatively associated with time to complete five repeated stand test in older men.

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