This thesis is based on the following articles, which are referred to in the text by their Roman numerals:
I Mehik A, Hellström P, Lukkarinen O, Sarpola A & Järvelin M-R (2000) Epidemiology of prostatitis in Finnish men: a population-based cross-sectional study. BJU Int 86: 443–448
II Mehik A, Hellström P, Sarpola A, Lukkarinen O & Järvelin M-R (2001) Fears, sexual disturbances and personality features in men with prostatitis: a population-based cross-sectional study in Finland. BJU Int 88: 35–38
III Mehik A, Hellström P, Lukkarinen O, Sarpola A & Alfthan O (1999) Increased intraprostatic pressure in patients with chronic prostatitis. Urol Res 27: 277–279
IV Mehik A, Hellström P, Lukkarinen O, Sarpola A & Alfthan O (2000) Prostatic tissue pressure measurement as a possible diagnostic procedure in patients with chronic nonbacterial prostatitis/chronic pelvic pain syndrome. Urol Res 28: 316–318