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New-onset diabetes in COVID-19 and clinical outcomes: A systematic review and meta-analysis

         

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BACKGROUND Diabetes mellitus(DM)is associated with adverse clinical outcomes and high mortality in patients with coronavirus disease 2019(COVID-19).The relationship between diabetes and COVID-19 is known to be bidirectional.AIM To analyze the rate of new-onset diabetes in COVID-19 patients and compare the clinical outcomes of new-onset diabetes,pre-existing diabetes,hyperglycemic,and non-diabetes among COVID-19 patients.METHODS We used the Meta-analysis of Observational Studies in Epidemiology statement for the present meta-analysis.Online databases were searched for all peerreviewed articles published until November 6,2020.Articles were screened using Covidence and data extracted.Further analysis was done using comprehensive meta-analysis.Among the 128 studies detected after thorough database searching,seven were included in the quantitative analysis.The proportion was reported with 95%confidence interval(CI)and heterogeneity was assessed using I2.RESULTS Analysis showed that 19.70%(CI:10.93-32.91)of COVID-19 patients had associated DM,and 25.23%(CI:19.07-32.58)had associated hyperglycemia.The overall mortality rate was 15.36%(CI:12.57-18.68)of all COVID-19 cases,irrespective of their DM status.The mortality rate was 9.26%among non-diabetic patients,10.59%among patients with COVID-19 associated hyperglycemia,16.03%among known DM patients,and 24.96%among COVID-19 associated DM patients.The overall occurrence of adverse events was 20.52%(CI:14.21-28.70)among COVID-19 patients in the included studies,15.29%among non-diabetic patients,20.41%among patients with COVID-19 associated hyperglycemia,20.69%among known DM patients,and 45.85%among new-onset DM.Metaregression showed an increasing rate of mortality among new hyperglycemic patients,known diabetics,and new-onset DM patients in comparison to those without diabetes.CONCLUSION A significantly higher rate of new onset DM and hyperglycemia was observed.Higher mortality rates and adverse events were seen in patients with new-onset DM and hyperglycemia than in the non-diabetic population.

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