KLK3 and prostate cancer: <h4>Aim</h4>To evaluate the feasibility, participation rate, diagnostic pathway performance, and early detection outcomes of the first year of the Croatian pilot prostate cancer screening program (CROState) implemented in Zagreb.<h4>Methods</h4>This prospective pilot program invited men aged 55-69 years without a prior prostate cancer diagnosis or prostate-specific antigen (PSA) testing in the past 12 months.