Figure.

Distribution (Tukey's box plot) of time between last infusion of rituximab according to disease severity and vital status

Boxes show the 25th, 50th, and 75th, and whiskers indicates values outside the lower and upper quartile with a length equal to 1·5 IQR. p values for comparison (Kruskal-Wallis for comparison between disease severity and Mann-Whitney U test for comparison between alive and deceased patients) are reported; p=0·0018 for either post-hoc comparison of severe disease group with moderate or mild disease group (calculated using Dunn's test). Five patients with missing data were excluded.