Assessment of the psychometrics of a PROMIS item bank: self-efficacy for managing daily activities

Ickpyo Hong, Craig A. Velozo, Chih Ying Li, Sergio Romero, Ann L. Gruber-Baldini, Lisa M. Shulman

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

Purpose: The aim of this study is to investigate the psychometrics of the Patient-Reported Outcomes Measurement Information System self-efficacy for managing daily activities item bank. Methods: The item pool was field tested on a sample of 1087 participants via internet (n = 250) and in-clinic (n = 837) surveys. All participants reported having at least one chronic health condition. The 35 item pool was investigated for dimensionality (confirmatory factor analyses, CFA and exploratory factor analysis, EFA), item-total correlations, local independence, precision, and differential item functioning (DIF) across gender, race, ethnicity, age groups, data collection modes, and neurological chronic conditions (McFadden Pseudo R2 less than 10 %). Results: The item pool met two of the four CFA fit criteria (CFI = 0.952 and SRMR = 0.07). EFA analysis found a dominant first factor (eigenvalue = 24.34) and the ratio of first to second eigenvalue was 12.4. The item pool demonstrated good item-total correlations (0.59–0.85) and acceptable internal consistency (Cronbach’s alpha = 0.97). The item pool maintained its precision (reliability over 0.90) across a wide range of theta (3.70), and there was no significant DIF. Conclusion: The findings indicated the item pool has sound psychometric properties and the test items are eligible for development of computerized adaptive testing and short forms.

Original languageEnglish (US)
Pages (from-to)2221-2232
Number of pages12
JournalQuality of Life Research
Volume25
Issue number9
DOIs
StatePublished - Sep 1 2016

Keywords

  • Daily activities
  • Item response theory
  • Patient-reported outcome measure
  • Self-efficacy

ASJC Scopus subject areas

  • Public Health, Environmental and Occupational Health

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