Assessing association of preoperative estimated glomerular filtration rate with postoperative acute kidney injury in very elderly surgical patients

Re: Wu Q, et al. Predictive role of estimated glomerular filtration rate prior to surgery in postsurgical acute kidney injury among very elderly patients: a retrospective cohort study. Ren Fail. 2019;41(1):866–874.

Lei WanDepartment of Anesthesiology, Beijing Friendship Hospital, Capital Medical University, Beijing, People’s Republic of China

Fu-Shan XueDepartment of Anesthesiology, Beijing Friendship Hospital, Capital Medical University, Beijing, People’s Republic of ChinaCorrespondence[email protected] [email protected]

Shao-Hua LiuDepartment of Anesthesiology, Beijing Friendship Hospital, Capital Medical University, Beijing, People’s Republic of China

Peng DongDepartment of Anesthesiology, Beijing Friendship Hospital, Capital Medical University, Beijing, People’s Republic of China