APOB and acute kidney injury: Compared with the non-CI-AKI group, the CI-AKI group had higher age, urea, baseline Cr, postoperative Cr, UA, hsCRP and Lp(a), ApoB levels as well as ApoB/ApoA-Ι ratio, lower Hb concentration, baseline eGFR and postoperative eGFR, and higher the diuretic medication rate (P < 0.05) (Table 1).