Differences in the relative OTU counts between males and females stratified by bladder management. For every individual, the OTU counts were normalized to the individual’s total OTU count. Differences between relative OTU counts were calculated by subtracting the average OTU counts from females and males per bladder management category; healthy control, void (SCI patient with no catheter usage), indwelling catheter (IC), and Foley catheter (FC) (see key for color coding and sample sizes). The X-axis indicates the difference in relative OTU counts per bacterial genus indicated on the Y-axis. Significant differences (P < 0.05) between the relative OTU counts are indicated by plus sign (+) for gender, and an asterisk (*) for bladder management. The inset depicts the mean and standard deviation of OTU counts of the indicated genera for each catheter management group.