Preoperative Hyponatremia And Hypocalcemia Predict Poor Prognosis In Elderly Gastric Cancer Patients

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Abstract
Background: Hyponatremia and hypocalcemia are common in patients with cancer, but their prognostic impact in patients who underwent gastric cancer (GC) surgery has not been investigated. Therefore, this study aimed to determine the postoperative prognostic impact of hyponatremia and hypocalcemia in patients undergoing curative gastrectomy by age group. Materials and methods: GC patients preoperatively diagnosed with hyponatremia or hypocalcemia who underwent elective radical gastrectomy were retrospectively evaluated. The patients were divided into the elderly group (≥60 years) and the young group (Results: Of the 842 patients evaluated, 36 (4.3%) were categorized into the younger hyponatremia group; 64 (7.6%), the elderly hyponatremia group; 48 (5.7%), the young hypocalcemia group; and 128 (15.2%), the elderly hypocalcemia group. Hyponatremia (P=0.001) and hypocalcemia (P=0.038) were independent risk factors for PCs in the elderly group. Further, hypocalcemia (hazard ratio (HR), 0.676; P=0.037) was independently associated with shorter OS. Conclusion: Preoperative hyponatremia and hypocalcemia predict poor outcomes in the elderly, but not in young GC patients. Further, hyponatremia and hypocalcemia in elderly GC patients should be corrected in the earliest time possible to obtain better clinical outcomes.

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