Table 2. Changes in clinical characteristics in 20 patients who acquired new bacterial infection in the prostate after TRPB.

Variables		Pre-biopsy (%)	Post-biopsy (%)	P value
No. of patients		20	20
PSA, ng/mL		9.54 ± 5.70	9.63 ± 8.08	0.960a
Sum of pain domain in NIH-CPSI		1.95 ± 3.80	1.80 ± 2.95	0.759a
WBC counts in EPS (No/HPF)				0.031b
	0–15	17 (85)	11 (55)
	≥ 16	3 (15)	9 (45)

TRPB = transrectal prostate biopsy, PSA = prostate-specific antigen, NIH-CPSI = National Institutes of Health-Chronic Prostatitis Symptom Index, WBC = white blood cell, EPS = expressed prostatic secretion, HPF = high power field.

^aWilcoxon-signed ranks test and ^bMcNemar test were used for comparing the changes of clinical characteristics between the pre- and post-TRPB.