title: [Fast test serum PSA determination (Sd Bioline PSA)].
abstract: OBJECTIVE
  Over the last years numerous semiquantitative PSA tests have appeared, based on serum or plasma immunochromatography. We present our experience using the SD BIOLINE PSA test, which is performed with plasma or serum for fast qualitative determination of PSA; the cutpoint is 3 ng/ml.
  
  
  METHODS
  We analized 54 patients who were admitted in our hospital ward. Two blood samples were obtained from every patient, one for cuantitative PSA determination at the hospital laboratory and the other one for qualitative determination with the SD BIOLINE PSA test, and the results were compared.. Two urologists independently interpreted the test without knowing the PSA values from the lab. To calculate the effect of test reading time, readings were performed at 15, 20 and 25 minutes. Results were classified in a classic contingency table, which enabled us to calculate sensitivity and specificity of the test, as well as positive and negative predictive values.
  
  
  RESULTS
  Mean age was 71. 1 years (range 43-96 yr). From 54 patients in the study 26 (48. 14%) had a PSA > 3 ng/ml (Mean 18.5 ng/ml, range 3.9-66.9 ng/ml) and 28 (51.86%) PSA < 3 ng/ml (mean 0.8 ng/mL, range 0-2.9 ng/mL), in the conventional test. Results for each interval and observer were: 15 min: Observer 1: Sensitivity (S) 76,92%, specificity (E) 100%, positive predictive value (PPV) 100%, negative predictive value (NPV) 82.35%; Observer 2: S 76.92%, E 100%, PPV 100%, NPV 82.35%. 20 minutes: Observer 1: S 100%, E 93.33%, PPV 92.30%, NPV 100%; Observer 2: S 100%, E 93.33%, PPV 92.30%, NPV 100%. 25 minutes: Observer 1: S 100%, E 85.71%, PPV 86.66%, NPV 100%; Observer 2: S 92.30%, E 92.85%, PPV 92.30%, NPV 92.85%.
  
  
  CONCLUSIONS
  The SD Bioline PSA test complies with the characteristics required to be used as a test for prostate cancer detection, it is simple, fast, cheap, not much invasive, and has a good efficacy.
authors.affiliation: Servicio de Urología, Consorcio Hospital General Universitario de Valencia, Valencia, España. pacoserrano_cruz@comv.es
authors.forename: Francisco Serrano de la Cruz
authors.initials: FS
authors.lastname: Torrijos
authors.forename: Emilio López
authors.initials: EL
authors.lastname: Alcina
authors.forename: Joaquín Ulises Juan
authors.initials: JU
authors.lastname: Escudero
authors.forename: Milagros Fabuel
authors.initials: MF
authors.lastname: Deltoro
authors.forename: Ana Montoliu
authors.initials: AM
authors.lastname: García
authors.forename: Arcadio Real
authors.initials: AR
authors.lastname: Romaguera
authors.forename: Macarena Ramos
authors.initials: MR
authors.lastname: de Campos
authors.forename: Emilio Marqués
authors.initials: EM
authors.lastname: Vidal
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001774:Blood Chemical Analysis / Q000295:instrumentation / Q000379:methods; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D017430:Prostate-Specific Antigen / Q000097:blood*; D013997:Time Factors
chemical_list: D017430:Prostate-Specific Antigen