KLK3 and prostate cancer: A retrospective analysis including 152 prostate cancer patients treated with radiotherapy at the Department of Radiotherapy at the Maria Sklodowska-Curie National Institute of Oncological Research (Gliwice, Poland) aimed to evaluate the prognostic value of the pretreatment values of not only PLR, NLR, lymphocyte-to-monocyte ratio (LMR), and platelets (PLT) but also other biological laboratory values including red blood cells (RBCs), prostate-specific antigen (PSA) level, Gleason score, and factors related to the patient including age, smoking status, and comorbidities.