Fig.

Trends in laboratory test results relative to day-of-ultrasound laboratory markers before and after ultrasound examination (day 0, gray vertical line) in patients with and without venous thrombosis. Owing to the variability in clinical ordering of each laboratory test, the data were grouped into 2-day intervals, and the median was plotted with standard error bars. The green dashed line indicates the median onset of coronavirus disease 2019 (COVID-19) symptoms relative to the day of ultrasonography. D-dimer (A), fibrinogen (B), prothrombin time (C), partial thromboplastin time (D), platelet count (E), C-reactive protein (CRP; F), and high-sensitivity troponin T (G).