Bone Metabolism and Bone Status in Osteoporotic Patients

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Abstract
We have studied bone turnover and bone status in 29 patients with hip fractures and compared them with normal subjects and patients with arthritis of the hip. Markers for bone formation, bone Gla protein, alkaline phosphatase and whole body retention of 99mTc-diphosphonate, and fasting urinary hydroxyproline, a marker for bone resorption, were all significantly higher in the hip fracture group than in the control group. The serum concentrations of 1.25-dihydroxyvitamins D were similar in the three groups, whereas the serum 25-hydroxyvitamin D concentration in the control group was higher than in the patient groups. The bone mineral content (BMC) measured in the distal forearm and the spine was lower than normal in the hip fracture group. We conclude that patients with hip fractures have an increased bone turnover with no signs of bimodality and low BMC values at all locations.

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