Objective The objective of the present study is to describe the item response theory (IRT) analysis of the National Institutes of Health (NIH) Patient Reported Outcomes Measurement Information System (PROMIS®) pediatric parent proxy-report item banks and the measurement properties of the new PROMIS® Parent Proxy Report Scales for ages 8-17 years. Methods Parent proxy-report items were written to parallel the pediatric self-report items. Test forms containing the items were completed by 1,548 parent-child pairs. CCFA and IRT analyses of scale dimensionality and item local dependence, and IRT analyses of differential item functioning were conducted. Results Parent proxy-report item banks were developed and IRT parameters are provided. The recommended unidimensional short forms for the PROMIS® Parent Proxy Report Scales are item sets that are subsets of the pediatric self-report short forms, setting aside items for which parent responses exhibit local dependence. Parent proxy-report demonstrated moderate to low agreement with pediatric self-report. Conclusions The study provides initial calibrations of the PROMIS® parent proxy-report item banks and the creation of the PROMIS® Parent Proxy-Report Scales. It is anticipated that these new scales will have application for pediatric populations in which pediatric self-report is not feasible.
- Item response theory
- Keywords PROMIS®
- Parent proxy report
ASJC Scopus subject areas
- Public Health, Environmental and Occupational Health