However, some limitations still existed in our study: (i) this was an observational, single-center study with relatively small cohort size; (ii) apart from Alb, other nutritional markers and variables (such as prealbumin, cholesterol, and MUAC) should also be taken into consideration when combined with inflammatory markers; and (iii) the involved population was composed of heterogeneous AKI patients in a tertiary comprehensive hospital and a potential selection bias might influence the result. Here, TTR is linked to acute kidney injury.