Association of FIXa:AT complex with clinical outcomes among patients with COVID-19. FIXa:AT level in patients divided by need for intensive care unit (ICU) (A) and lung CT score at admission (B). (C-E) P values from Mann-Whitney test. Correlation coefficients between FIXa:AT level with other clinical outcomes. Samples from 2 patients were not processed because of critical preanalytic issues (low volume).