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- Title
Assessment of the psychometrics of a PROMIS item bank: self-efficacy for managing daily activities.
- Authors
Hong, Ickpyo; Velozo, Craig; Li, Chih-Ying; Romero, Sergio; Gruber-Baldini, Ann; Shulman, Lisa; Velozo, Craig A; Gruber-Baldini, Ann L; Shulman, Lisa M
- Abstract
<bold>Purpose: </bold>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.<bold>Methods: </bold>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 R (2) less than 10 %).<bold>Results: </bold>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.<bold>Conclusion: </bold>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.
- Subjects
PSYCHOMETRICS; SELF-efficacy; HEALTH outcome assessment; CHRONIC diseases &; psychology; DIFFERENTIAL item functioning (Research bias); TEST reliability; COMPUTER adaptive testing; PATIENTS; CHRONIC disease treatment; QUALITY of life; RESEARCH evaluation; RESEARCH funding; ACTIVITIES of daily living
- Publication
Quality of Life Research, 2016, Vol 25, Issue 9, p2221
- ISSN
0962-9343
- Publication type
journal article
- DOI
10.1007/s11136-016-1270-1