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Table 1 NIH consensus classification and definition of 4 categories of prostatitis [1]

From: Acupuncture for chronic prostatitis/chronic pelvic pain syndrome: study protocol for a randomized controlled trial

NIH consensus classification of prostatitis

Definition

(I) Acute bacterial prostatitis

Acute infection of the prostate

(II) Chronic bacterial prostatitis

Chronic or recurrent infection of the prostate

(III) Chronic prostatitis/chronic pelvic pain syndrome

No demonstrated infection

 IIIA Inflammatory CP/CPPS

Leukocytes in expressed prostatic secretions, post prostate massage urine, or semen

 IIIB Non-inflammatory CP/CPPS

No evidence of inflammation

(IV) Asymptomatic inflammatory prostatitis

No subjective symptoms detected, inflammation shown either by prostate biopsy or the presence of leukocytes in EPS/semen during evaluation for infertility or other disorders

  1. NIH National Institutes for Health, CP/CPPS chronic prostatitis/chronic pelvic pain syndrome