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Evidence for the validity of the Short-form 36 Questionnaire (SF-36) in an elderly population
R A Lyons1, H M Perry, B N Littlepage
1Department of Public Health Medicine, West Glamorgan Health Authority, Swansea.
Age and Ageing
|May 1, 1994
Summary
The Short-form 36 Health Status Questionnaire (SF-36) is a valid tool for assessing health in older adults. Interview administration ensures high data completeness and reliability in this demographic.
Area of Science:
- Gerontology
- Health Outcomes Research
- Psychometrics
Background:
- Assessing health status in elderly populations is crucial for effective healthcare.
- The Short-form 36 Health Status Questionnaire (SF-36) is a widely used health assessment tool.
- Its applicability in older adults requires specific validation.
Purpose of the Study:
- To evaluate the suitability of the SF-36 for use in an elderly demographic.
- To assess the psychometric properties of the SF-36 in adults aged 65 and over.
Main Methods:
- A random sample of 827 adults was surveyed.
- The SF-36 was administered via interview.
- Data from 216 participants aged 65+ were analyzed for completeness, internal consistency, and construct validity.
Main Results:
- Data completeness for the elderly group (aged 65+) was high at 98.8%.
- Internal consistency, measured by Cronbach's alpha, exceeded 0.8 for all parameters, indicating good reliability.
- Construct validity was supported, as the SF-36 effectively differentiated between individuals with and without indicators of poorer health.
Conclusions:
- The SF-36 demonstrates suitability for assessing health status in elderly individuals.
- Interview administration enhances the reliability and completeness of SF-36 data in older populations.
- The SF-36 is a psychometrically sound instrument for gerontological health research.