KLK3 and benign prostatic hyperplasia: First, the NHIRD does not contain detailed information regarding the symptom severity of BPH, the histological and TNM classification of PCa and BC, serum sex hormone concentrations, Prostate-Specific Antigen (PSA) levels, T. vaginalis antibody test, family history, or personal history such as sexual exposure, physical activity, alcohol consumption or tobacco smoking.