Assessment of the psychometrics of a PROMIS item bank: self-efficacy for managing daily activities.
Qual Life Res
; 25(9): 2221-32, 2016 09.
Article
in En
| MEDLINE
| ID: mdl-27048495
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 R (2) 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.Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Psychometrics
/
Activities of Daily Living
/
Self Efficacy
/
Patient Reported Outcome Measures
Limits:
Adolescent
/
Adult
/
Aged
/
Aged80
/
Female
/
Humans
/
Male
/
Middle aged
Language:
En
Journal:
Qual Life Res
Journal subject:
REABILITACAO
/
TERAPEUTICA
Year:
2016
Type:
Article
Affiliation country:
United States