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Randomized Controlled Trial
. 2010 May;19(4):595-607.
doi: 10.1007/s11136-010-9619-3. Epub 2010 Mar 7.

An item response analysis of the pediatric PROMIS anxiety and depressive symptoms scales

Debra E Irwin  1 , Brian Stucky, Michelle M Langer, David Thissen, Esi Morgan Dewitt, Jin-Shei Lai, James W Varni, Karin Yeatts, Darren A DeWalt
Affiliations
Randomized Controlled Trial

An item response analysis of the pediatric PROMIS anxiety and depressive symptoms scales

Debra E Irwin et al. Qual Life Res. 2010 May.

Abstract

Purpose: The Patient-Reported Outcomes Measurement Information System (PROMIS) aims to develop self-reported item banks for clinical research. The PROMIS pediatrics (aged 8-17) project focuses on the development of item banks across several health domains (physical function, pain, fatigue, emotional distress, social role relationships, and asthma symptoms). The psychometric properties of the anxiety and depressive symptom item banks are described.

Methods: Participants (n = 1,529) were recruited in public school settings, hospital-based outpatient and subspecialty pediatrics clinics. The anxiety (k = 18) and depressive symptoms (k = 21) items were split between two test administration forms. Hierarchical confirmatory factor-analytic models (CFA) were conducted to evaluate scale dimensionality and local dependence. IRT analyses were then used to finalize item banks and short forms.

Results: CFA results confirmed that anxiety and depressive symptoms are separate constructs and indicative of negative affect. Items with local dependence and DIF were removed resulting in 15 anxiety and 14 depressive symptoms items. The psychometric differences between short forms and simulated computer adaptive tests are presented.

Conclusions: PROMIS pediatric item banks were developed to provide efficient assessment of health-related quality of life domains. This sample provides initial calibrations of anxiety and depressive symptoms item banks and creates PROMIS pediatric instruments, version 1.0.

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Figures

Fig. 1
Fig. 1
The upper panel shows the test information function for the anxiety item pool, and for the eight-item subset of the pool that is most informative near the middle of the distribution, and the lower panel shows the corresponding curves for the depressive symptoms item pool
Fig. 2
Fig. 2
Test information curves for the most informative set of eight items from the anxiety (upper panel) and depressive symptoms (lower panel) item pools at T-scores of 30, 40, 50, 60, and 70
See this image and copyright information in PMC

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