IGFBP7 and acute kidney injury: Sub-analysis of PRAKI cases according to categories of AKI showed that the median [TIMP-2]*[IGFBP7] is higher in prerenal and postrenal causes as compared with intrinsic renal causes but without statistical significance (14.4(5.6–27.2), 15.9(15.9–15.9) and 7.5(4.9–12.5), respectively; P=0.303) as shown in Figure 5.