Comparisons of subject characteristics by study group.
CROSS
Mean (standard deviation) or Count (%). For testing, race was collapsed into 3 categories: white, non-white, and other/no answer. MW = Mann-Whitney U test; LSRPS = Levenson Self Report Psychopathy Scale; RCVAS = Red Cross Visual Analog Score (0–100, higher scores indicate a more positive view of the Red Cross).