borderline significanceP = 0.049
Biomarker analysis showed variations in inflammation and oxidative stress by severity, with borderline significance, P = 0.049. serum Selenium levels were highest in HFpEF (98.4 μg/L) and lowest in HFmrEF (59.1), increasing in HFrEF (78.7) and severe HFrEF (89.2).