Application of longitudinal item response theory models to modeling Parkinson’s disease progression
Zou H, Aggarwal V, Stebbins G, Müller M, Cedarbaum J, Pedata A, Stephenson D, Simuni T, Luo S. Application of longitudinal item response theory models to modeling Parkinson’s disease progression. CPT Pharmacometrics & Systems Pharmacology 2022, 11: 1382-1392. PMID: 35895005, PMCID: PMC9574723, DOI: 10.1002/psp4.12853.Peer-Reviewed Original ResearchConceptsEarly Parkinson's diseaseParkinson's diseaseDisease progressionProgression rateUnified Parkinson's Disease Rating Scale part 2Stage 1Yahr stage 1Higher baseline severityCommon clinical outcomeLongitudinal disease progressionSlow progression rateParkinson's disease progressionMovement Disorder SocietyStage 2Clinical outcomesMotor signsBaseline severitySlow progressionSum scoreTotal scoreLongitudinal item response theory modelProgressionSeverityPatientsDisease