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Am J Med ; 115(2): 115-21, 2003 Aug 01.
Article in English | MEDLINE | ID: mdl-12893397

ABSTRACT

PURPOSE: Parathyroid hormone-related peptide (PTHrP) is the predominant cause of malignancy-associated hypercalcemia. However, its prognostic utility is unclear. We aimed to determine the prognostic value of serum PTHrP levels in patients who had hypercalcemia associated with malignancy. METHODS: In this prospective case series, we evaluated 76 patients with a diagnosis of cancer and hypercalcemia (serum calcium level >/=10.3 mg/dL on at least two occasions). PTHrP levels >/=1 pmol/L were considered elevated. We used multivariate Cox regression analysis to identify factors associated with mortality. RESULTS: Fifty patients (66%) died during follow-up. In a multivariate analysis, higher pretreatment calcium levels and elevated PTHrP levels were associated with increased mortality, with effects of PTHrP varying by age (P = 0.03). Survival was associated with pretreatment calcium levels both in patients over 65 years of age (hazard ratio [HR] per mg/dL = 1.5; 95% confidence interval [CI]: 1.2 to 1.8; P <0.001) and in patients aged 65 years or less (HR = 1.3; 95% CI: 1.1 to 1.5; P = 0.003). Adjusted for pretreatment calcium levels, elevated PTHrP levels were associated with increased mortality in patients aged

Subject(s)
Hypercalcemia/blood , Hypercalcemia/mortality , Neoplasms/blood , Neoplasms/mortality , Peptide Hormones/blood , Biomarkers/blood , Comorbidity , Female , Humans , Male , Middle Aged , Multivariate Analysis , Neoplasms/diagnosis , Parathyroid Hormone-Related Protein , Predictive Value of Tests , Prognosis , Prospective Studies , Reference Values , Survival Analysis
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