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庫欣氏症候群病人發生骨質疏鬆與低血鈣關聯性之回溯性分析

A Retrospective Study of Association of Osteoporosis and Hypocalcemia in Patients with Cushing's Syndrome

摘要


庫欣氏症候群與骨質疏鬆有高度相關性。庫欣氏症候群病人體內高濃度的糖皮質素(glucocorticoids),會抑制骨質形成及腸道鈣質的吸收,因此在這群病人因骨質疏鬆引發骨折的風險是正常人的4-5倍以上,其中有高達70%的病人會發生脊椎骨的骨折,引發長期背痛、駝背、身高變矮等症狀。本研究回溯性調查從2001年1月1日至2017年12月31日在門診追蹤曾接受骨密度檢查的庫欣氏症候群病人共356位,骨質疏鬆的發生與病人年紀、身高有關連性,而且骨質疏鬆的病人有顯著較高比例的低血鈣(18.8 vs. 5.4%, p<0.001; 9.3 vs. 9.0 mg/dL, p<0.001),經校正完病人年齡、性別、其他次發性骨質疏鬆的原因等可能干擾因子,低血鈣引起骨質疏鬆的勝算比(odds ratio):2.79(95%信賴區間:1.15-6.75)。我們的研究發現庫欣氏症候群病人合併骨質疏鬆發生低血鈣的比例顯著較高,暗示著這些病人可能需要特別注重鈣質的補充,配合適當的骨質疏鬆藥物治療,可能可以降低後續發生骨折失能的風險。

並列摘要


Cushing's syndrome (CS) has a close relationship with osteoporosis. Glucocorticoid (GC) excess inhibits bone formation and calcium absorption from the gut. As a result, patients with CS had fivefold more fractures than normal people and up to 70% of CS patients with vertebral fractures were reported. Bone fractures lead to back pain, kyphosis, and significant height loss. This study is a retrospective analysis of CS patients with bone-density examination from January 1, 2001 to December 31, 2017. A total of 356 CS patients were enrolled. Old age and lower height associated with the diagnosis of osteoporosis in our study. After adjustment for age, sex and other confounders, the odds ratio of hypocalcemia for osteoporosis was of 2.79 (95% CI: 1.15-6.75). From our study, CS patients with osteoporosis have a significantly higher percentage of hypocalcemia (18.8% vs 5.4%, p<0.001), which suggests adequate calcium supplementation should be maintained for those patients.

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