Reliability and Validity of the HD-PRO-TriadTM, a Health-Related Quality of Life Measure Designed to Assess the Symptom Triad of Huntington’s Disease
Article type: Research Article
Authors: Boileau, Nicholas R.a | Stout, Julie C.b | Paulsen, Janes S.c; d; e | Cella, Davidf; g; h | McCormack, Michael K.i; j | Nance, Martha A.k; l | Frank, Samuelm | Lai, Jin-Sheif | Carlozzi, Noelle E.a; *
Affiliations: [a] Department of Physical Medicine and Rehabilitation, University of Michigan, Ann Arbor, MI, USA | [b] School of Psychological Sciences, Monash University, Clayton, Victoria, Australia | [c] Department of Psychiatry, Carver College of Medicine, The University of Iowa, Iowa City, IA, USA | [d] Department of Neurology, Carver College of Medicine, The University of Iowa, Iowa City, IA, USA | [e] Department of Psychological and Brain Sciences, The University of Iowa, Iowa City, IA, USA | [f] Department of Medical Social Sciences, Northwestern University, Chicago, IL, USA | [g] Department of Preventive Medicine, Northwestern University, Chicago, IL, USA | [h] Northwestern University, Evanston, IL, USA | [i] Department of Pathology, Rowan University – SOM, Stratford, NJ, USA | [j] Department of Psychiatry, Rutgers University, RWJMS, Piscataway, NJ, USA | [k] Struthers Parkinson’s Center, Golden Valley, MN, USA | [l] Hennepin County Medical Center, Minneapolis, MN, USA | [m] Beth Israel Deaconess Medical Center, Boston, MA, USA
Correspondence: [*] Correspondence to: Noelle E. Carlozzi, PhD, Department of Physical Medicine and Rehabilitation, University of Michigan, North Campus Research Complex, 2800 Plymouth Road, Building NCRC B14, Room G216, Ann Arbor, MI 48109-2800, USA. Tel.: +1 734 763 8917; Fax: +1 734 763 7186; E-mail: [email protected].
Abstract: Background:Huntington’s disease (HD), is a neurodegenerative disorder that is associated with cognitive, behavioral, and motor impairments that diminish health related quality of life (HRQOL). The HD-PRO-TRIADTM is a quality of life measure that assesses health concerns specific to individuals with HD. Preliminary psychometric characterization was limited to a convenience sample of HD participants who completed measures at home so clinician-ratings were unavailable. Objectives:The current study evaluates the reliability and validity of the HD-PRO-TRIADTM in a well-characterized sample of individuals with HD. Methods:Four-hundred and eighty-two individuals with HD (n = 192 prodromal, n = 193 early, and n = 97 late) completed the HD-PRO-TRIADTM questionnaire. Clinician-rated assessments from the Unified Huntington Disease Rating Scales, the short Problem Behaviors Assessment, and three generic measures of HRQOL (WHODAS 2.0, RAND-12, and EQ-5D) were also examined. Results:Internal reliability for all domains and the total HD-PRO-TRIADTM was excellent (all Cronbach’s α >0.93). Convergent and discriminant validity were supported by significant associations between the HD-PRO-TRIADTM domains, and other patient reported outcome measures as well as clinician-rated measures. Known groups validity was supported as the HD-PRO-TRIADTM differentiated between stages of the disease. Floor and ceiling effects were generally within acceptable limits. There were small effect sizes for 12-month change over time and moderate effect sizes for 24-month change over time. Conclusions:Findings support excellent internal reliability, convergent and discriminant validity, known groups validity, and responsiveness to change over time. The current study supports the clinical efficacy of the HD-PRO-TRIADTM. Future research is needed to assess the test-retest reliability of this measure.
Keywords: HD-PRO-TRIADTM, health-related quality of life, Huntington’s disease, patient reported outcome (PRO), psychometric, reliability, validity
DOI: 10.3233/JHD-170238
Journal: Journal of Huntington's Disease, vol. 6, no. 3, pp. 201-215, 2017