Table 4.

Median TSAT, ferritin, CRP and ESA resistance index in subgroups according to NT-proNBP levels high (>5000 ng/mL) or low (≤5000 ng/mL)

Variable	Baseline NT-proNBP level		p value
	Low n = 975	High n = 624
TSAT, %	29.8	28.2	0.05
Ferritin, µg/L	430.0	470.0	0.11
CRP, mg/L	4.0	5.0	0.003
ESA resistance index	1.1	1.3	<0.001

Italicized values indicate significant differences (p < 0.01) between subgroups

CV cardiovascular, CRP C-reactive protein, ESA erythropoiesis-stimulating agent, NT-proBNP N-terminal pro-B-type natriuretic peptide, TSAT transferrin saturation