[Serum parathyroid hormone levels predict hospitalization in outpatients of heart failure: a preliminary study].

Objective To evaluate the predicative value of serum parathyroid hormone (PTH) levels in outpatients of heart failure (HF) for hospitalization. Methods A total of 102 consecutive HF outpatients were enrolled.The receiver operating characteristic (ROC) curves demonstrated the optimal cut-off points of PTH levels for hospitalization due to HF.And Logistic regression analysis model was employed to analyze the independent association between PTH and hospitalization for HF. Results The more advanced grade of New York Heart Association (NYHA), the higher serum level of PTH.The ROC curves showed PTH levels≥56.05 ng/L were the optimal cut-off point for hospitalization for HF with a sensitivity of 90.0%, a specificity of 89.2% and the area under ROC curve of 0.92.After adjustment for predictors for hospitalization due to HF (gender, age, diabetes mellitus, hypertension, left ventricular ejection fraction, estimated glomerular filtration rate and brain natriuretic peptide), PTH levels were associated with hospitalization due to HF (OR=1.282,95% CI 1.026-1.362). Conclusion The serum level of PTH in HF outpatients is an independent predicator for hospitalization due to HF. Key words: Parathyroid hormone; Heart failure,congestive; Hospitalization; Natriuretic peptide, brain