title: [Transrectal prostatic biopsy management policy for patients older than 50 years in relation to PSA values elaborated by a mathematical decision tree].
abstract: OBJECTIVE
  To decide the action politics (to perform or not transrectal prostatic biopsy) for a PSA cut point of 4 and 10 ng/ml through the construction of a mathematical decision tree.
  
  
  METHODS
  We calculate the usefulness of the biopsy through a subjective score, from 0 to 10, established after a survey of the 20 staff members of the health-care area, applying an global analysis with creation of total profile cards through an orthogonal design.
  
  
  RESULTS
  The main usefulness of prostate cancer screening would be not to perform transrectal prostatic biopsies when PSA is lower than 4 ng/ml.
authors.affiliation: Servicio de Urología, Hospital Santa Bárbara, Ciudad Real, España. danielsantosarrontes@yahoo.es
authors.forename: Daniel
authors.initials: D
authors.lastname: Santos Arrontes
authors.forename: Ignacio
authors.initials: I
authors.lastname: Cortés Aránguez
authors.forename: Francisco
authors.initials: F
authors.lastname: Begara Morillas
authors.forename: Manuel
authors.initials: M
authors.lastname: Fernández Arjona
authors.forename: Fernando
authors.initials: F
authors.lastname: de Castro Barbosa
mesh_terms: D000230:Adenocarcinoma / Q000097:blood / Q000175:diagnosis* / Q000453:epidemiology; D000367:Age Factors; D000368:Aged; D014408:Biomarkers, Tumor / Q000097:blood*; D001706:Biopsy / Q000379:methods / Q000706:statistics & numerical data*; D019090:Case Management; D002391:Catchment Area, Health; D003663:Decision Trees; D006291:Health Policy; D006801:Humans; D008297:Male; D008875:Middle Aged; D009363:Neoplasm Proteins / Q000097:blood*; D011050:Policy Making; D011467:Prostate / Q000473:pathology*; D017430:Prostate-Specific Antigen / Q000097:blood*; D011471:Prostatic Neoplasms / Q000097:blood / Q000175:diagnosis* / Q000453:epidemiology; D013030:Spain / Q000453:epidemiology
chemical_list: D014408:Biomarkers, Tumor; D009363:Neoplasm Proteins; D017430:Prostate-Specific Antigen