A comparison between two different definitions of contrast-associated acute kidney injury for long-term mortality in pat

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RESEARCH ARTICLE

Open Access

A comparison between two different definitions of contrast‑associated acute kidney injury for long‑term mortality in patients with diabetes undergoing coronary angiography: a prospective cohort study Zhubin Lun1,2,3†, Li Lei3,4†, Dianhua Zhou2†, Ming Ying3, Liwei Liu3,4, Guanzhong Chen3, Jin Liu3, Yibo He3, Huanqiang Li3, Zhidong Huang3, Yongquan Yang3, Jianfeng Ye2* and Yong Liu3* 

Abstract  Background:  The definitions of contrast-associated acute kidney injury (CA-AKI) are diverse and have different predictive effects for prognosis, which are adverse for clinical practice. Few articles have discussed the relationship between these definitions and long-term prognosis in patients with diabetes. Methods:  A total of 1154 diabetic patients who were undergoing coronary angiography (CAG) were included in this study. Two definitions of CA-AKI were used: CA-AKIA was defined as an increase ≥ 0.3 mg/dl or > 50% in serum creatinine (SCr) from baseline within 72 h after CAG, and CA-AKIB was defined as an increase ≥ 0.5 mg/dl or > 25% in SCr from baseline within 72 h after CAG. We used Cox regression to evaluate the association of these two CA-AKI definitions with long-term mortality and calculate the population attributable risks (PARs) of different definitions for long-term prognosis. Results:  During the median follow-up period of 7.4 (6.2–8.2) years, the overall long-term mortality was 18.84%, and the long-term mortality in patients with CA-AKI according to both CA-AKIA and CA-AKIB criteria were 36.73% and 28.86%, respectively. We found that CA-AKIA (HR: 2.349, 95% CI 1.570–3.517, p = 0.001) and CA-AKIB (HR: 1.608, 95% CI 1.106–2.339, p = 0.013) were associated with long-term mortality. The PARs were the highest for CA-AKIA (31.14%), followed by CA-AKIB (14.93%).

*Correspondence: [email protected]; [email protected] † Zhubin Lun, Li Lei and Dianhua Zhou have contributed equally to this work 2 Department of Cardiology, Dongguan TCM Hospital, Dongguan 523000, China 3 Department of Cardiology, Guangdong Provincial Key Laboratory of Coronary Heart Disease Prevention, Guangdong Cardiovascular Institute, Guangdong Provincial People’s Hospital, The Affiliated Guangdong Provincial People’s Hospital of South China University of Technology, Guangdong Academy of Medical Sciences, Guangzhou 510080, China Full list of author information is available at the end of the article © The Author(s) 2020. Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your int