Psychometric Evaluation of the Patient Satisfaction With Logistical Aspects of Navigation (PSN-L) Scale Using Item Response Theory

Medical Care (Impact Factor: 3.23). 04/2014; 52(4):354-61. DOI: 10.1097/MLR.0000000000000089
Source: PubMed


Patient navigation--the provision of logistical, educational, and emotional support needed to help patients "navigate around" barriers to high-quality cancer treatment offers promise. No patient-reported outcome measures currently exist that assess patient navigation from the patient's perspective. We use a partial independence item response theory model to report on the psychometric properties of the Patient Satisfaction with Navigation, Logistical measure developed for this purpose.

We used data from an ethnically diverse sample (n = 1873) from the National Cancer Institute Patient Navigation Research Program. We included individuals with the presence of an abnormal breast, cervical, colorectal, or prostate cancer finding.

The partial independence item response theory model fit well. Results indicated that scores derived from responses provide extremely precise and reliable measurement between -2.5 SD below and 2 SD above the mean and acceptably precise and reliable measurement across nearly the entire range.

Our findings provide evidence in support of the Patient Satisfaction with Navigation, Logistical. Scale users should utilize 1 of the 2 described methods to create scores.

Download full-text


Available from: Adam C Carle, Aug 18, 2014
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: This study was to evaluate the construct validity of WHOQOL-BREF & Disabilities module for physical disabilities (PD) and intellectual disabilities (ID) people, using Item Response Theory (IRT) Graded Response Model (GRM) analysis. As one of 14 centres for the field study of the WHOQOL Disabilities module, a stratified representative sample of Guangzhou general disabled people was approached for interview. It contained 1000 respondents: 807 physical disabled people and 193 intellectual disabled people. IRT GRM analysis was used to evaluate the construct validity of WHOQOL-BREF & Disabilities module. Each domain of WHOQOL-BREF showed appropriate fit to the two-parameter IRT GRM. The Disabilities module as overall one domain had a better fitting than as three domains. Discrimination parameters of item 3, 11, 12, 14, 16 and 25 were statistically equal to one for both the PD 5-point response version and the ID 3-point response version of the scales. The domain test information curves showed that the PD group had a larger range of scale scores of information >5 than the ID group. The construct validity of WHOQOL-BREF and Disabilities module using GRM analysis complements previous validation studies.
    Full-text · Conference Paper · Nov 2014