Cited by 464Sleep and related disordersCancer survivorship and careSleep and Work-Related Fatigue

Psychometric evaluation of the Pittsburgh Sleep Quality Index in cancer patients

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Beck, Susan L, Schwartz, Anna L, Towsley, Gail, Dudley, William, Barsevick, Andrea·2004·Journal of Pain and Symptom Management

Abstract

This report summarizes findings related to the psychometric properties (internal consistency and construct validity) of the Pittsburgh Sleep Quality Index (PSQI) and discusses issues related to its use based on data from two clinical studies with diverse samples of cancer patients. Subjects completed a questionnaire that included the PSQI, the Schwartz Cancer Fatigue Scale, and specific demographic, disease, and treatment variables. There were complete data on 170 (of 214) cases in Study 1 and 249 (of 259) cases in Study 2. The Cronbach's alpha for the Global Sleep Quality scale was 0.81 in Study 1 and 0.77 in Study 2 A comparison of Global Sleep Quality in two contrasting groups with low and high fatigue yielded statistically significant differences in both samples. Psychometric evaluation supports its internal consistency reliability and construct validity. However, the scoring is rather cumbersome and raises questions regarding level of measurement and appropriate analysis techniques.

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Crossref · 10.1016/j.jpainsymman.2003.12.002

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Authors
Beck, S. L., Schwartz, A. L., Towsley, G., Dudley, W., & Barsevick, A.
Affiliations
Fox Chase Cancer Center (US)
Corresponding author
Beck, Susan L
Venue
Journal of Pain and Symptom Management
Publisher
Elsevier BV
Published
2004-02
Volume
27
Issue
2
Pages
140-148
ISSN
0885-3924 (ISSN-L)
OpenAlex
W2087150179
Cited by
464
References
26
Citations by year
2026: 15 · 2025: 30 · 2024: 40 · 2023: 26 · 2022: 34 · 2021: 33 · 2020: 33 · 2019: 18 · 2018: 16 · 2017: 12 · 2016: 27 · 2015: 25 · 2014: 22 · 2013: 19 · 2012: 24
FWCI
9.85
Type
journal article
Language
en
Open access
Locations
  • Journal of Pain and Symptom Management (publishedVersion)
  • PubMed (publishedVersion)
  • NC Digital Online Collection of Knowledge and Scholarship (The University of North Carolina at Greensboro) (submittedVersion)
Funders
  • National Cancer Institute
  • National Institute of Nursing Research (R01 NR04573-04, R01NR004573)
Topics
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and related disorders
  • Health Sciences › Medicine › Oncology › Cancer survivorship and care
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and Work-Related Fatigue
Keywords
Pittsburgh Sleep Quality Index, cancer patients, sleep quality, psychometric properties, internal consistency, construct validity, cancer-related fatigue, questionnaire scoring, levels of measurement
MeSH terms
Female, Humans, Male, Neoplasms, Pennsylvania, Psychometrics, Surveys and Questionnaires, Self-Assessment, Sensitivity and Specificity, Severity of Illness Index, Sleep Wake Disorders, Reproducibility of Results, Comorbidity, Benchmarking

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