title: [Validation in Spain of the quality of life questionnaire PROSQOLI in patients with advanced prostate cancer].
abstract: OBJECTIVE
  Validation of the PROSQOLI questionnaire adapted to Spanish, pursing an instrument to evaluate, in the common clinical practice, the quality of life in patients with locally advanced or disseminated prostate cancer in our country.
  
  
  METHODS
  A cross-sectional prospective study was designed in 750 patients (150 centers) with disseminated or locally advanced prostate cancer (TNM criterion) who came to the scheduled check-up. Socio-demographic and clinical data of the participants were collected. The subjects filled out the PROSQOLI and EQ-5D questionnaires. The analysis included 561 cases that met the selection criteria. The psychometric characteristics (feasibility, validity and reliability) of the adapted PROSQOLI questionnaire were studied.
  
  
  RESULTS
  Mean age was 73.63 (7.59) years. A total of 72.01% of the participants had locally advanced disease. In 28.16%, the primary treatment was radiotherapy, in 12.30% it was prostatectomy. A total of 83.48% received hormone treatment. The mean for each scale of the PROSQOLI questionnaire varied from 68.86 to 74.51. The percentage of no response was less than 3% for each scale. The percentage of subjects with minimum score in any scale was negligible, and the maximum score did not surpass 5%. Mean time to fill out the questionnaire was 109.42 (101.00) seconds. Cronbach's α coefficient was 0.937 and the total item correlation was superior to 0.7 for all the items. Correlations with the EQ-5D questionnaire were moderate. Scores on the questionnaire were associated to all the parameters studied related to the disease.
  
  
  CONCLUSIONS
  The adapted questionnaire has adequate psychometric properties for its use in research and in the clinical practice.
authors.affiliation: Servicio de Urología, Hospital del Henares, Coslada, Madrid, España. Manuel.fernandez@salud.madrid.org
authors.forename: M
authors.initials: M
authors.lastname: Fernández-Arjona
authors.forename: G
authors.initials: G
authors.lastname: de la Cruz
authors.forename: J A
authors.initials: JA
authors.lastname: Delgado
authors.forename: J M
authors.initials: JM
authors.lastname: Malet
authors.forename: J A
authors.initials: JA
authors.lastname: Portillo
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003430:Cross-Sectional Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D011471:Prostatic Neoplasms / Q000175:diagnosis; D011788:Quality of Life; D013030:Spain; D011795:Surveys and Questionnaires