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  • Title: Osteoporosis and spinal fractures in men with prostate cancer: risk factors and effects of androgen deprivation therapy.
    Author: Diamond TH, Bucci J, Kersley JH, Aslan P, Lynch WB, Bryant C.
    Journal: J Urol; 2004 Aug; 172(2):529-32. PubMed ID: 15247721.
    Abstract:
    PURPOSE: We determined the risk factors for osteoporosis and spinal fractures in men with prostate cancer receiving androgen deprivation therapy. MATERIALS AND METHODS: We performed a retrospective analysis of 87 consecutive men with prostate cancer receiving androgen deprivation therapy referred for evaluation of osteoporosis. Data were comprised of lateral thoracolumbar radiographs, bone densitometry, serum biochemistry and a detailed assessment of osteoporotic risk factors. Multivariate regression analysis was used to determine the major risk factors for osteoporosis and spinal fractures. RESULTS: There were 38 (44%) men who were 74.5 years old with radiographic evidence of spinal fractures. They had an initial mean prostate specific antigen of 52.8 ng/ml and had received androgen deprivation therapy for a mean of 39.6 months (95% confidence interval 28.7 to 50.4). Mean spinal (quantitative computerized tomography t-score -4.2) and femoral neck bone mineral densities (dual energy x-ray absorptiometry t-score -2.1) were significantly lower than in men without spinal fractures (p < 0.001 for all measurements). In the regression analysis the duration of androgen deprivation therapy (p = 0.002), serum 25-hydroxyvitamin D levels (p = 0.003) and a history of alcohol excess (defined as more than 4 standard drinks daily, p = 0.04) were the main determinants of spinal fractures. CONCLUSIONS: Prolonged androgen deprivation therapy, low serum 25-hydroxyvitamin D levels and a history of alcohol excess are important risk factors for osteoporosis and spinal fractures in men with prostate cancer.
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