Fig. 2

Spearman Rho Correlation Analysis: We categorized the COVID-19 patients into groups separated by the ordinal outcome scale (OOS). Serum NfL [pg/ml] correlates with an intermediate, unfavorable outcome in COVID-19 patients. A On the x-axis, the first OOS is represented with ordinal variables between 0 and 8. On the y-axis, the mean values of sNfL measured in pg/ml are represented. B On the x-axis, the second OOS is represented with ordinal variables between 0 and 8. On the y-axis, the mean values of sNfL measured in pg/ml are represented. C A Pearson correlation analysis showed that sNfL correlates significantly with creatinine in COVID-19 patients and ARDS patients. On the x-axis, creatinine values [mg/dl] and on the y-axis sNfL values are shown as measured in all 48 patients of this study