NPPB and chronic kidney disease: Correlation and linear regression analyses assessed the relationship between hemoglobin and BNP, adjusting for age, sex, chronic kidney disease (CKD), and estimated glomerular filtration rate (eGFR).<h4>Results</h4>Among 2,144 patients (median age 67 years; 50.8% female), anemia was present in 56.4% (95% CI 54.3%-58.5%), with moderate anemia most common (53.2%).