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Related Experiment Videos

Reliability and validity of a steadiness score.

Daniel O Clark1, Christopher M Callahan, Steven R Counsell

  • 1Indiana University Center for Aging Research, Indianapolis, Indiana, USA. dclark@regenstrief.org

Journal of the American Geriatrics Society
|September 3, 2005
PubMed
Summary

Three survey questions accurately measure steadiness in older adults, predicting future falls and functional decline. These questions can help identify individuals at risk for impairment and disability.

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Area of Science:

  • Gerontology
  • Public Health
  • Rehabilitation Science

Background:

  • Assessing functional status in older adults is crucial for preventing falls and disability.
  • Validated survey instruments are needed for community-based screening.

Purpose of the Study:

  • To evaluate the internal consistency, construct validity, and predictive validity of three survey questions on steadiness.
  • To assess the utility of these questions in identifying risks among low-income, community-dwelling older adults.

Main Methods:

  • A 6-month prospective cohort study involving 357 low-income older adults.
  • Interviewer-administered surveys collected data on steadiness, mobility, activities of daily living (ADLs), instrumental activities of daily living (IADLs), and health outcomes.
  • Statistical analyses examined internal consistency, construct validity (correlations with mobility and function), and predictive validity for falls and decline.

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Main Results:

  • The three steadiness questions demonstrated good internal consistency (Cronbach's alpha = 0.88).
  • Strong correlations were found with mobility, ADL, and IADL scores, supporting construct validity.
  • Steadiness significantly predicted future falls, hospitalizations, and decline in ADL/IADL function over 6 months.

Conclusions:

  • The three steadiness questions are reliable and valid measures for assessing functional status in older adults.
  • These questions can serve as a valuable tool in survey research and clinical settings for early identification of fall and disability risk.
  • Implementing these questions can aid in proactive interventions to maintain independence and quality of life in aging populations.