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. 2022 Dec 16;10:e14570. doi: 10.7717/peerj.14570

Figure 1. Screening flowchart.

Figure 1

Through collecting the clinical data of 2,120 confirmed COVID-19 patients admitted to Renmin Hospital of Wuhan University from January 31 to February 10, 2020, a total of 107 patients with previously confirmed diabetes were first selected. According to the exclusion criteria, nine patients were subsequently excluded. In addition, 33 patients with missing clinical data were also screened out. Finally, 65 patients with COVID-19 and pre-existing T2DM were included in this study. They were divided into a well-controlled group (blood glucose: 3.9–10.0 mmol/L) and a poorly-controlled group (blood glucose >10.0 mmol/L) according to the admission blood glucose levels.