Abstract
The aim of the study was to evaluate the 10-year probability of hip fracture and a major osteoporotic fracture using the FRAX algorithm, vitamin D status, bone mineral density (BMD), and biochemical markers of bone turnover in men over 50 years of age with type 2 diabetes mellitus (T2DM). We estimated FRAX-predicted 10-year fracture probability, levels of 25-hydroxyvitamin D (25-OH-D), markers of bone turnover, and bone mineral density at the L1–L4 (lumbar spine (LS)) and femur neck (FN) in 68 men with T2DM and compared these with an age-matched group (n = 68). The mean (range) age of the T2DM group was 61.4 (51–78) years. The prevalence of hypovitaminosis D (25-OH-D <75 nmol/L) was 59 %. The mean (range) FRAX hip fracture and FRAX major osteoporotic fracture was 0.7 (0–2.8) and 3.2 (0–8.5) %, respectively. BMD at the FN (0.974 vs. 0.915 g/cm2, p = 0.008) and LS (1.221 vs. 1.068 g/cm2, p < 0.001) was significantly higher in the T2DM cohort as compared to the healthy age-matched males. 25-OH-vitamin D (67.7 vs.79.8 nmol/L, p < 0.001), crosslaps (0.19 vs. 0.24 μg/L, p = 0.004), and osteocalcin (13.3 vs. 15.7 μg/L, p = 0.004) were significantly lower in the T2DM group. There was no difference in FRAX-related fracture probability between the two groups. Acknowledging the limitations of our study size, we suggest that the increased BMD in T2DM and the noninclusion of T2DM as a secondary risk factor in the FRAX algorithm may be probable explanations for the discordance between literature-observed and FRAX-related fracture probabilities.
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This work is supported by the OTKA 105073 research grant (H.P.B.) and the TÁMOP 4.2.1./B-09/1/KONV-2010-0007 project (H.P.B, E.K., A.B, G.P., P.A-S., M.K.), which is implemented through the New Hungary Development Plan, co-financed by the European Union and the European Social Fund.
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Bhattoa, H.P., Onyeka, U., Kalina, E. et al. Bone metabolism and the 10-year probability of hip fracture and a major osteoporotic fracture using the country-specific FRAX algorithm in men over 50 years of age with type 2 diabetes mellitus: a case–control study. Clin Rheumatol 32, 1161–1167 (2013). https://doi.org/10.1007/s10067-013-2254-y
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DOI: https://doi.org/10.1007/s10067-013-2254-y