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Readability and Comprehension of the Geriatric Depression Scale and PROMIS® Physical Function Items in Older African Americans and Latinos

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Listed:
  • Sylvia H. Paz

    (UCLA)

  • Loretta Jones

    (Healthy African American Families
    Charles R. Drew University of Medicine and Science)

  • José L. Calderón

    (UCLA)

  • Ron D. Hays

    (UCLA
    RAND Corporation)

Abstract

Background Depression and physical function are particularly important health domains for the elderly. The Geriatric Depression Scale (GDS) and the Patient-Reported Outcomes Measurement Information System (PROMIS®) physical function item bank are two surveys commonly used to measure these domains. It is unclear if these two instruments adequately measure these aspects of health in minority elderly. Objective The aim of this study was to estimate the readability of the GDS and PROMIS® physical function items and to assess their comprehensibility using a sample of African American and Latino elderly. Methods Readability was estimated using the Flesch–Kincaid and Flesch Reading Ease (FRE) formulae for English versions, and a Spanish adaptation of the FRE formula for the Spanish versions. Comprehension of the GDS and PROMIS® items by minority elderly was evaluated with 30 cognitive interviews. Results Readability estimates of a number of items in English and Spanish of the GDS and PROMIS® physical functioning items exceed the U.S. recommended 5th-grade threshold for vulnerable populations, or were rated as ‘fairly difficult’, ‘difficult’, or ‘very difficult’ to read. Cognitive interviews revealed that many participants felt that more than the two (yes/no) GDS response options were needed to answer the questions. Wording of several PROMIS® items was considered confusing, and interpreting responses was problematic because they were based on using physical aids. Conclusions Problems with item wording and response options of the GDS and PROMIS® physical function items may reduce reliability and validity of measurement when used with minority elderly.

Suggested Citation

  • Sylvia H. Paz & Loretta Jones & José L. Calderón & Ron D. Hays, 2017. "Readability and Comprehension of the Geriatric Depression Scale and PROMIS® Physical Function Items in Older African Americans and Latinos," The Patient: Patient-Centered Outcomes Research, Springer;International Academy of Health Preference Research, vol. 10(1), pages 117-131, February.
    • Handle: RePEc:spr:patien:v:10:y:2017:i:1:d:10.1007_s40271-016-0191-y
    DOI: 10.1007/s40271-016-0191-y
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    1. Unknown, 2016. "Department Publications 2014," Publications Lists 239845, University of Minnesota, Department of Applied Economics.
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    1. Gerardo Santoyo-Sánchez & César Merino-Soto & Sergio Flores-Hernández & Blanca Estela Pelcastre-Villafuerte & Hortensia Reyes-Morales, 2022. "Content Validity of a Scale Designed to Measure the Access of Older Adults to Outpatient Health Services," IJERPH, MDPI, vol. 19(16), pages 1-16, August.

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