Short-form adaptive measure of financial toxicity from the Economic Strain and Resilience in Cancer (ENRICh) study: Derivation using modern psychometric techniques

Cai Xu, Grace L Smith, Ying-Shiuan Chen, Cristina M Checka, Sharon H Giordano, Kelsey Kaiser, Lisa M Lowenstein, Hilary Ma, Tito R Mendoza, Susan K Peterson, Ya-Chen T Shih, Sanjay Shete, Chad Tang, Robert J Volk and Chris Sidey-Gibbons

PLOS ONE, 2022, vol. 17, issue 8, 1-16

Abstract: Objectives: This study sought to evaluate advanced psychometric properties of the 15-item Economic Strain and Resilience in Cancer (ENRICh) measure of financial toxicity for cancer patients. Methods: We surveyed 515 cancer patients in the greater Houston metropolitan area using ENRICh from March 2019 to March 2020. We conducted a series of factor analyses alongside parametric and non-parametric item response theory (IRT) assessments using Mokken analysis and the graded response model (GRM). We utilized parameters derived from the GRM to run a simulated computerized adaptive test (CAT) assessment. Results: Among participants, mean age was 58.49 years and 278 (54%) were female. The initial round factor analysis results suggested a one-factor scale structure. Negligible levels of differential item functioning (DIF) were evident between eight items. Three items were removed due to local interdependence (Q3>+0.4). The original 11-point numerical rating scale did not function well, and a new 3-point scoring system was implemented. The final 12-item ENRICh had acceptable fit to the GRM (p

Date: 2022
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Persistent link: https://EconPapers.repec.org/RePEc:plo:pone00:0272804

DOI: 10.1371/journal.pone.0272804

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