Differential item function analysis of a scale measuring worry about affording healthcare in multiple sclerosis.
|Title||Differential item function analysis of a scale measuring worry about affording healthcare in multiple sclerosis.|
|Publication Type||Journal Article|
|Year of Publication||2016|
|Authors||Jones SMW, Amtmann D|
|Date Published||2016 Nov|
PURPOSE/OBJECTIVE: A measure of worry about affording health care was developed in people with multiple sclerosis (MS) to further the study of how trouble affording health care can affect health. This study examined whether the measure showed bias by gender, age, insurance type, income, and type of MS. Absence of bias would facilitate comparisons between groups in future studies. Research methods/Design: A sample of 433 people with MS completed the 5-item worry about affording health care measure. Demographic information was also collected. To test for bias, we used differential item function analysis with the graded response model of item response theory. We tested for bias from gender, age, insurance type, income, and type of MS.
|Alternate Journal||Rehabil Psychol|