Duzen, OmerErkoc, RehaBegenik, HuseyinSoyoral, Yasemin UsulAldemir, Mehmet Naci2025-05-102025-05-1020120886-022X1525-604910.3109/0886022X.2011.6485962-s2.0-84857540135https://doi.org/10.3109/0886022X.2011.648596https://hdl.handle.net/20.500.14720/1317Reha, Erkoc/0009-0001-7230-8843Background and objective: Prolonged corticosteroid (CS) use induces osteoporosis; the pathogenesis of this condition is multifactorial and includes CS-induced hypercalciuria. We investigated the course of hypercalciuria and related markers of bone metabolism parameters during and after the CS treatment. Materials and Methods: We recruited 42 patients who were taking at least 10 mg/day of methylprednisolone or an equivalent dose of CSs for at least 30 days. The 24-h urinary calcium and sodium, a spot urinary calcium/creatinine ratio, and urinary deoxypyridinoline were measured prior to the treatment, at day 7, at days 30-60, and after the cessation of the treatment. Additionally, the serum levels of phosphorus, calcium, alkaline phosphatase (ALP), albumin, creatinine, osteocalcin, and parathyroid hormone (PTH) were analyzed. Results: The 24-h urinary calcium excretion was significantly increased at day 7 (182.2 +/- 158.6 mg/day; p < 0.001) and at days 30-60 (196.9 +/- 167.8 mg/day; p < 0.001) compared with baseline (98.7 +/- 88.1 mg/day) and returned to basal level after the cessation of the CSs (118.9 +/- 90.2 mg/day; p = 0.725). The urinary deoxypyridinoline level was significantly higher at days 30-60 compared with basal level. The serum osteocalcin level was decreased at days 30-60 when compared with day 7. No significant changes were detected in the PTH, phosphorus, creatinine, and ALP levels. Conclusions: CS treatment induces hypercalciuria just after starting the treatment until the end of it. CS-induced hypercalciuria promptly improved after cessation of the treatment. By days 30-60, the excretion of urinary deoxypyridinoline was accompanied by hypercalciuria. The serum osteocalcin level was decreased at days 30-60 when compared with day 7.eninfo:eu-repo/semantics/closedAccessCorticosteroid TreatmentHypercalciuriaSpot Urinary Calcium/Creatinine RatioDeoxypyridinolineOsteocalcinArticle343Q2Q233834222260330WOS:000300558700014