Fig. 2

Comparison of decision algorithms for PE in COVID-19. (A) Mosaic diagram with each field’s size corresponding to the count of correct and false rule-in and -out (i.e., to the four fields of the respective contingency tables). False rule-out in red signifies missed PEs and the correct rule-out in dark blue corresponds to correctly avoided CTPA or V/Q. (B) Violin plot of D-dimer levels, comparing PE versus no PE. The p-value is calculated using a two-sided Mann-Whitney test. The dashed line corresponds to a Ddimer of 1 µg/ml; the dotted line to 0.5 µg/ml. (C) Spearman correlation of Ddimer and interleukin-6. The vertical dashed line corresponds to an interleukin-6 of 1.5 pg/ml; values < 1.5 pg/ml are considered normal. Note the log-transformed axes for d-dimer and interleukin-6 in (B) and (C)