Efficacy of Risedronate in Japanese Male Patients with Primary Osteoporosis

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Objective Although osteoporosis in men previously was relatively neglected, bisphosphonates have been strongly suggested as potent therapeutic agents. However, there are few studies on the effects of risedronate in male osteoporosis, especially in Japanese with primary osteoporosis. The aim of our study was to prospectively evaluate the effects of risedronate on bone mineral density (BMD) and bone turnover in Japanese male patients. Methods According to the therapeutic regimen, the subjects were divided into two groups (group A, 22 with risedronate; group B, 10 without risedronate). During a one-year study duration, we measured bone-specific alkaline phosphatase (BAP) and serum N-terminal telopeptide of type I collagen (NTx) every 3 months, and BMD at 7 sites by dual-energy X-ray absorptiometry every 6 months. Patients The subjects were 32 Japanese male patients with untreated primary osteoporosis. Results In group A, but not in group B, BMD was significantly increased at the lumbar spine both at 6 months and 12 months, and at the femoral neck at 12 months, compared with baseline. Likewise, in group A, but not in group B, both BAP and NTx were significantly decreased at all time points measured (3 months, 6 months, and 12 months), compared with baseline. Conclusion These results confirmed the beneficial effects of risedronate upon increasing BMD and reducing bone turnover markers in Japanese male patients with primary osteoporosis, comparable to those previously reported in postmenopausal patients with osteoporosis.
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Efficacy of Risedronate in Japanese Male Patients with Primary Osteoporosis

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