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Spinal deformity index in patients with type 2 diabetes.

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Spinal deformity index in patients with type 2 diabetes.

Endocrine. 2013 Jun;43(3):651-8

Authors: Di Somma C, Rubino M, Faggiano A, Vuolo L, Contaldi P, Tafuri N, Tafuto N, Andretti M, Savastano S, Colao A

The objective of this study is to investigate bone metabolism, density, and quality in patients with diabetes type 2 using DEXA and spinal deformity index (SDI), a surrogate index of bone quality. Fifty-six patients with type 2 diabetes were studied; exclusion criteria were diseases and medications that affect bone and mineral metabolism. Mean age was 65 ± 7 years. Mean diabetes duration was 10 ± 7 years and mean HbA1C was 6.6 ± 0.5 %. BMI was 30 ± 4. Fifty-six sex, age, and BMI matched served as controls. All subjects underwent a clinical and biochemical examination. Spinal and femoral neck BMD were measured by DEXA, and a spine radiography was performed to assess vertebral fractures and to calculate SDI. Mean serum 25-OH vitamin D levels were 19.6 ± 3.7 ng/ml in patients and 30 ± 14 ng/ml in controls (p < 0.01). PTH serum levels were 47.9 ± 40 pg/ml in patients versus 37 ± 5.3 pg/ml in controls (p < 0.01). At lumbar spine there was a significant difference between patients and controls only for T-score (p = <0.01), while at femoral neck there was a difference in BMD (p < 0.01) and in T-score (p < 0.01). Radiological vertebral fractures were found in 46 % of patients and 17 % of controls (p < 0.05). SDI was higher in patients than in controls (p < 0.05). The percentage of fractures with T-score BMD greater than -2.5 was 69 % in patients and 10 % in controls (p < 0.05). As a conclusion, BMD was similar in patients and in controls, while SDI value was higher in patients; therefore, SDI was more specific than BMD for the diagnosis of osteoporosis due to metabolic diseases.

PMID: 23229683 [PubMed – indexed for MEDLINE]

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