Urinary Prothrombin Fragment 1+2 in relation to Development of Non-Symptomatic and Symptomatic Venous Thromboembolic Events following Total Knee Replacement

Figure 1

Box-and-whisker plot for the prothrombin fragment 1+2 excreted in urine. Box-and-whisker plot for the prothrombin fragment 1+2 excreted in urine in the venous thromboembolism group (Cases) and the matched, event-free, control group on each sampling day. Prothrombin fragment 1+2 levels (pmol/L) are plotted on a logarithmic scale. Day 0 is the day of total knee replacement. Day 7±2 is the day of venography. Day 39 is the day of follow-up. Boxes are lower and upper quartiles with the median represented as the line in the box. The extremes of the whiskers are the quartiles ± 1.5 times the interquartile range, with outliers given as points.