ENG and chronic kidney disease: Within the preserved renal function/stage 1 CKD group, endoglin concentrations were not different in individuals with eGFR ≥110 mL/min/1.73 m2 compared with eGFR 90-<110 mL/min (4.65±1.32 ng/mL vs. 4.09±1.09 ng/mL, P = 0.23).