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Differential Item Functioning In The Patient Reported Outcomes Measurement Information System Pediatric Short Forms In A Sample Of Children And Adolescents With Cerebral Palsy., Wendy J. Coster, Pengsheng Ni, Mary D. Slavin, Pamela A. Kisala, Ratna Nandakumar, Mary Jane Mulcahey, David S. Tulsky, Alan M. Jette

Department of Occupational Therapy Faculty Papers

AIM: The present study examined the Patient Reported Outcomes Measurement Information System (PROMIS) Mobility, Fatigue, and Pain Interference Short Forms (SFs) in children and adolescents with cerebral palsy (CP) for the presence of differential item functioning (DIF) relative to the original calibration sample.

METHOD: Using the Graded Response Model we compared item parameter estimates generated from a sample of 303 children and adolescents with CP (175 males, 128 females; mean age 15y 5mo) to parameter estimates from the PROMIS calibration sample, which served as the reference group. DIF was assessed in a two-step process using the item response theory-likelihood ratio-differential …

Franklin Delano Roosevelt: The Diagnosis Of Poliomyelitis Revisited., John F. Ditunno, Jr, Bruce E. Becker, Gerald J. Herbison

Department of Rehabilitation Medicine Faculty Papers

Revisiting the ailments of famous historical persons in light of contemporary medical understanding has become a common academic hobby. Public discussion of Franklin Delano Roosevelt's (FDR) diagnosis of poliomyelitis after his sudden onset of paralysis in 1921 has received just such a revisitation. Recently, this 2003 historical analysis has been referenced widely on the Internet and in biographies, raising speculation that his actual diagnosis should have been Guillain-Barré Syndrome, a noncontagious disease of the peripheral nervous system rather than poliomyelitis. The authors of that 2003 analysis used a statistical analysis of his case by selectively choosing some of his reported …