New measures to capture end of life concerns in Huntington disease: Meaning and Purpose and Concern with Death and Dying from HDQLIFE (a patient-reported outcomes measurement system)

N. E. Carlozzi*, N. R. Downing, M. K. McCormack, S. G. Schilling, J. S. Perlmutter, Elizabeth A Hahn, Jin-Shei Lai, S. Frank, K. A. Quaid, J. S. Paulsen, David Cella, S. M. Goodnight, J. A. Miner, M. A. Nance

*Corresponding author for this work

Research output: Contribution to journalArticle

18 Scopus citations

Abstract

Purpose: Huntington disease (HD) is an incurable terminal disease. Thus, end of life (EOL) concerns are common in these individuals. A quantitative measure of EOL concerns in HD would enable a better understanding of how these concerns impact health-related quality of life. Therefore, we developed new measures of EOL for use in HD. Methods: An EOL item pool of 45 items was field tested in 507 individuals with prodromal or manifest HD. Exploratory and confirmatory factor analyses (EFA and CFA, respectively) were conducted to establish unidimensional item pools. Item response theory (IRT) and differential item functioning analyses were applied to the identified unidimensional item pools to select the final items. Results: EFA and CFA supported two separate unidimensional sets of items: Concern with Death and Dying (16 items), and Meaning and Purpose (14 items). IRT and DIF supported the retention of 12 Concern with Death and Dying items and 4 Meaning and Purpose items. IRT data supported the development of both a computer adaptive test (CAT) and a 6-item, static short form for Concern with Death and Dying. Conclusion: The HDQLIFE Concern with Death and Dying CAT and corresponding 6-item short form, and the 4-item calibrated HDQLIFE Meaning and Purpose scale demonstrate excellent psychometric properties. These new measures have the potential to provide clinically meaningful information about end-of-life preferences and concerns to clinicians and researchers working with individuals with HD. In addition, these measures may also be relevant and useful for other terminal conditions.

Original languageEnglish (US)
Pages (from-to)2403-2415
Number of pages13
JournalQuality of Life Research
Volume25
Issue number10
DOIs
StatePublished - Oct 1 2016

Keywords

  • End of life
  • HDQLIFE
  • Health-related quality of life
  • Huntington disease
  • Neuro-QoL
  • PROMIS
  • Patient-reported outcome (PRO)

ASJC Scopus subject areas

  • Public Health, Environmental and Occupational Health

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    Carlozzi, N. E., Downing, N. R., McCormack, M. K., Schilling, S. G., Perlmutter, J. S., Hahn, E. A., Lai, J-S., Frank, S., Quaid, K. A., Paulsen, J. S., Cella, D., Goodnight, S. M., Miner, J. A., & Nance, M. A. (2016). New measures to capture end of life concerns in Huntington disease: Meaning and Purpose and Concern with Death and Dying from HDQLIFE (a patient-reported outcomes measurement system). Quality of Life Research, 25(10), 2403-2415. https://doi.org/10.1007/s11136-016-1354-y