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  • Title: Mineral metabolism in spinal cord injury.
    Author: Naftchi NE, Viau AT, Sell GH, Lowman EW.
    Journal: Arch Phys Med Rehabil; 1980 Mar; 61(3):139-42. PubMed ID: 7369852.
    Abstract:
    In 10 paraplegic and 10 quadroplegic subjects, bone resorption was investigated by determining urinary excretion of hydroxyproline, calcium, and phosphorus. Measurements were performed weekly from the onset to 4 months after injury. During the first 7 weeks following injury, urinary excretion of calcium in paraplegic and quadriplegic subjects reached the highest level (380 +/- 180 mg/24hr). From 7 to 16 weeks after injury average urinary excretion of calcium (245 +/- 72 mg/24hr) remained significantly greater than that in controls (100 +/- 25 mg/24hr; p less than 0.05). Urinary hydroxyproline was elevated in paraplegic subjects (80 +/- 18 mg/24hr) for 8 weeks and in quadriplegic subjects (102 +/- 37 mg/24hr) for the entire 16 weeks following injury compared with that in controls (48 +/- 12 mg/24hr; p less than 0.05). Both paraplegic and quadriplegic subjects excreted more phosphorus (1.6 +/- 0.4 gm/24hr) than controls (0.85 +/- 0.2 gm/24hr; p less than 0.05) only during the first 2 weeks following spinal cord injury. During the acute phase of the injury (0-3 months), urinary excretion of calcium and magnesium was significantly higher (p less than 0.05) in subjects with complete compared with incomplete spinal cord lesions.
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