Table 2. Differences in clinical characteristics between patients of HWP and PAH.

Variable	HWP	PAH	p value
No. of patient	12	25
Age (yr)	57.91±15.82	54.92±14.62	0.432
Serum PSA (ng/mL)	2.11±1.78	2.44±2.49	0.796
Prostate size (mL)	40.18±14.53	32.16±15.23	0.121
NIH-CPSI
Sum of items 1~4	0.00±0.00	5.72±5.24	0.001*
Item 5 and 6	2.25±3.16	2.28±2.26	0.579
Sum of items 7~9	2.25±2.89	4.32±2.93	0.023*
Total (items 1~9)	4.50±5.86	12.24±8.70	0.003*

Values are presented as number only or mean±standard deviation.

PAH: prostatitis-associated hematospermia, HWP: hematospermia patients without any evidence of prostatitis, PSA: prostate-specific antigen, NIH-CPSI: National Institutes of Health Chronic Prostatitis Symptom Index.

^*p<0.05.