title: Validity of a low literacy version of the Decisional Conflict Scale.
abstract: OBJECTIVE
  To evaluate the psychometric properties of the 4-factor low literacy Decisional Conflict Scale (DCS-LL) with men eligible for prostate cancer screening (PCS).
  
  
  METHODS
  We used baseline (T0; n=149) and post-intervention (T2; n=89) data from a randomized, controlled trial of a PCS decision aid to assess internal consistency reliability and construct, discriminant, and factor validity.
  
  
  RESULTS
  There was evidence of excellent internal consistency reliability (α's≥.80) and fair construct validity (most r's≥.40) for the DCS-LL except for the Supported subscale. The DCS-LL was able to discriminate between men who had decided and those who had not. There was evidence for the original 4-factor model at T0 but exploratory analysis suggested a 3-factor solution at T0 and T2 with Informed and Value Clarity as one factor.
  
  
  CONCLUSIONS
  For men eligible for PCS, feeling informed and feeling clear about values may not reflect distinct cognitive processes. Feeling supported may not be a factor contributing to uncertainty.
  
  
  CONCLUSIONS
  Research should address whether current DCS subscales best represent the factors that contribute to uncertainty for PCS and for other screening decisions. Research should also explore the influence of health literacy on the factor structure of the DCS-LL.
authors.affiliation: Department of General Internal Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX, USA. sklinder@mdanderson.org
authors.forename: Suzanne K
authors.initials: SK
authors.lastname: Linder
authors.forename: Paul R
authors.initials: PR
authors.lastname: Swank
authors.forename: Sally W
authors.initials: SW
authors.lastname: Vernon
authors.forename: Patricia D
authors.initials: PD
authors.lastname: Mullen
authors.forename: Robert O
authors.initials: RO
authors.lastname: Morgan
authors.forename: Robert J
authors.initials: RJ
authors.lastname: Volk
mesh_terms: D000328:Adult; D000368:Aged; D003220:Conflict, Psychological; D003657:Decision Making; D003661:Decision Support Techniques; D005163:Factor Analysis, Statistical; D007722:Health Knowledge, Attitudes, Practice; D006801:Humans; D007802:Language; D008297:Male; D008403:Mass Screening; D008875:Middle Aged; D010342:Patient Acceptance of Health Care / Q000523:psychology*; D010353:Patient Education as Topic / Q000379:methods*; D010358:Patient Participation; D011471:Prostatic Neoplasms / Q000175:diagnosis* / Q000523:psychology*; D011594:Psychometrics; D016032:Randomized Controlled Trials as Topic; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires; D035501:Uncertainty