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Survival curves. Training data set (A): the survival time of SARS-CoV-2 patients in the high-risk group differed significantly from that of the low-risk subjects, with a median of 12 days (95% CI; 10–14). The low-risk group did not achieve the 50% survival rate. Test dataset (B): the median survival duration of the high-risk group was 9 days (95% CI; 6–37) and low-risk patients did not reach the median survival of 50%.
