AUTHOR=Zhou Yangzhong , Ren Qidong , Chen Gang , Jin Qiao , Cui Quexuan , Luo Huiting , Zheng Ke , Qin Yan , Li Xuemei 

TITLE=Chronic Kidney Diseases and Acute Kidney Injury in Patients With COVID-19: Evidence From a Meta-Analysis

JOURNAL=Frontiers in Medicine

VOLUME=7

YEAR=2020

URL=https://www.frontiersin.org/journals/medicine/articles/10.3389/fmed.2020.588301

DOI=10.3389/fmed.2020.588301

ISSN=2296-858X

ABSTRACT=<p>Renal involvement has been implicated in coronavirus disease 2019 (COVID-19), but the related prevalence and prognosis were largely unknown. In this meta-analysis, we searched the literature from PubMed, Embase, through bioRxiv, and medRxiv until April 26, 2020. Studies reporting chronic kidney diseases (CKDs) and/or acute kidney injury (AKI) were included. Demographics, relevant data of disease severity, and patient's prognosis were extracted and aggregated. Twenty-one thousand one hundred sixty-four patients from 52 peer-reviewed studies were included. Thirty-seven studies (<italic>n</italic> = 16,922) reported CKD in COVID-19 patients at diagnosis, and the pooled prevalence was 3.52% (95% CI, 1.98–5.48%; <italic>I</italic><sup>2</sup> = 93%). Subgroup analysis showed that CKD prevalence was higher in severe cases [odds ratio (OR), 3.42; 95% CI 2.05–5.61; <italic>I</italic><sup>2</sup> = 0%] compared to those with non-severe disease and deceased cases (6.46, 3.40–12.29; <italic>I</italic><sup>2</sup> = 1%) compared with survivors. Pooled prevalence of CKD was lower in Chinese patients (2.56%; 95% CI, 1.79–3.47%; <italic>I</italic><sup>2</sup> = 80%) compared to those outside of China (6.32%; 95% CI, 0.9–16.12%; <italic>I</italic><sup>2</sup> = 93%) (<italic>p</italic> = 0.08). The summary estimates for AKI prevalence was 11.46% (95% CI, 6.93–16.94%). Patients with AKI had a higher prevalence of developing into severe cases (OR, 6.97; 95% CI, 3.53–13.75; <italic>I</italic><sup>2</sup> = 0%) and mortality risk (45.79, 36.88–56.85; <italic>I</italic><sup>2</sup> = 17%). The prevalence estimates of CKD or AKI were not significantly different from preprint publications (<italic>p</italic> &gt; 0.05). Our study indicates that renal condition, either in CKD or AKI, is associated with COVID-19 prognosis, and taking care of such patients needs further awareness and investigations.</p>