Frequency of HIMMs and TMMs in transfusions with at least 8 CCIs or less than 8 CCIs. HIMMs (A) and TMMs (B) in transfusions with at least 8 CCIs (▪) or less than 8 CCIs (□). The number of relevant HIMMs or TMMs is shown in the x-axes of the panels. TMMs were grouped by 2 (ie, 1-2, 3-4) to simplify the graphical presentation. Distribution of TMMs and HIMMs according to CCIs was analyzed using the χ² test. NB: Fisher exact test comparing frequency of CCIs less than 8 or CCIs at least 8 in transfusions with no more than 16 compared to more than 16 TMMs demonstrated a p₂ value of < .001.