Change in PT-INR values based on warfarin dose.

The results are presented as boxplots of PT-INR categorized by PIH and groups. The group size (n) for each group is indicated below the box. The p-values were determined using the Kruskal–Wallis test at each PIH by group to compare the control, L-W, and H-W groups; p-values <0.1, as determined using the Steel–Dwass post-hoc test, are indicated above the square brackets. BW, bone window; C, control; H-W, high warfarin dose; L-W, low warfarin dose; PIH, post-injury hours; PT-INR, prothrombin time-international normalized ratio; SI, scalp incision; TBI, traumatic brain injury.

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