PROMIS® Parent Proxy Report Scales: an item response theory analysis of the parent proxy report item banks Academic Article uri icon


  • 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.

author list (cited authors)

  • Varni, J. W., Thissen, D., Stucky, B. D., Liu, Y., Gorder, H., Irwin, D. E., ... DeWalt, D. A.

citation count

  • 66

complete list of authors

  • Varni, James W||Thissen, David||Stucky, Brian D||Liu, Yang||Gorder, Hally||Irwin, Debra E||DeWitt, Esi Morgan||Lai, Jin-Shei||Amtmann, Dagmar||DeWalt, Darren A

publication date

  • October 2011