Using item response theory to enrich and expand the PROMIS® pediatric self report banks.

Health Qual Life Outcomes · 2014 · PMC4212129 · PMID 25344155

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marginally significantno p-value reported

Confirmatory factor analysis using a bifactor MIRT model indicated that the LD, while marginally significant, was at a very low level; the value of ECV for the 20-item set was 0.87, suggesting a close approximation to unidimensionality.

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