system
Medical AI Inquiry: You was designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.  Labels: OBJECTIVE, METHODS, RESULTS. Meshes: Aged, Area Under Curve, Biomarkers, Female, Heart Failure, Hospital Mortality, Hospitalization, Humans, Kaplan-Meier Estimate, Male, Middle Aged, Predictive Value of Tests, Prevalence, Proportional Hazards Models, Prospective Studies, ROC Curve, Risk Assessment, Risk Factors, Stroke Volume, Time Factors, Turkey, Ventricular Function, Left, Vitamin D, Vitamin D Deficiency.
user
Do vitamin D levels predict hospitalization and mortality in patients with heart failure? Context: Low levels of vitamin D are closely associated with cardiovascular diseases. Heart failure (HF) is a major health problem globally, occurring with increasing frequency and characterised by poor prognosis despite therapy. We aimed to investigate the effect of vitamin D levels on hospitalisation and mortality in patients with HF. Patients with ejection fraction <50% (n = 219) were included in this prospective study. Demographic, clinical and laboratory parameters were obtained at presentation. Patients were classified into Group 1 (vitamin D level ≤50 nmol/L) and Group 2 (vitamin D level >50 nmol/L). Median follow-up time was 12 months. Hospitalisation rates and overall survival were compared between groups. Independent predictors of hospitalisation and mortality were defined. With a median follow-up period of 12 months, hospitalisation and overall death occurred more frequently in Group 1 than in Group 2 (23.4% vs 7.3% and 16.1% vs 1.2%, respectively; p < 0.005 for both).Vitamin D was defined as an independent predictor of hospitalisation and mortality.Higher levels were found to be associated with decreased hospitalisation (HR 0.89, 95% CI 0.84-0.95, p < 0.001) and mortality (HR 0.83, 95% CI 0.75-0.92, p < 0.001).
assistant
Vitamin D deficiency is highly prevalent in patients with HF, and low vitamin D levels are closely associated with increased hospitalisation and mortality. Final Decision: yes