Study on the relationship between vitamin D, grip strength and muscle mass in elderly diabetic patients / 中国综合临床

ABSTRACT

Objective:To study the relationship between vitamin D level and muscle mass and grip strength in elderly patients with type 2 diabetes mellitus (T2DM).Methods:From May 2016 to January 2018, 201 patients with type 2 diabetes mellitus aged ≥ 60 who were admitted to the Department of endocrinology of Xuanwu Hospital were selected for prospective study. According to 25-hydroxyvitamin D level(25(OH)D), the patients were divided into the vitamin D deficiency group (25(OH)D<20 μg/L, 140 cases) and the non-deficiency group (20 μg/L≤25(OH)D<70 μg/L, 61 cases). The grip strength, walking speed and muscle mass of upper and lower limbs were measured.Physical examination and laboratory examination were carried out.Results:There was no significant difference between the two groups ( P>0.05). The grip strength, upper limb and lower limb muscle contents in the non deficiency group were significantly higher than those in the deficiency group ((33.49±9.43) kg vs.(29.59±10.30) kg, (4.99±1.09) kg vs.(4.57±1.11) kg, (15.69±3.10) kg vs.(14.54±3.03) kg, P=0.01, 0.015, 0.017). Multivariate logistic regression analysis showed that vitamin D deficiency was independently related to grip strength and lower limb muscle mass( OR=1.286, 95% CI: 1.197-1.346, P<0.01; OR=1.231, 95% CI: 1.102-1.283, P<0.05). Conclusion:Vitamin D deficiency is a risk factor for the decrease of grip strength and lower extremity muscle mass in elderly patients with type 2 diabetes.