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Development and evaluation of the Osteoporosis Self-Efficacy Scale
M L Horan1, K K Kim, P Gendler
1Kirkhof School of Nursing, Grand Valley State University, Allendale, MI 49401, USA.
Research in Nursing & Health
|October 7, 1998
Summary
The Osteoporosis Self-Efficacy Scale measures confidence in physical activity and calcium intake for osteoporosis prevention. This psychometrically sound scale is a valuable research tool for assessing preventive behaviors.
Area of Science:
- Health Psychology
- Behavioral Science
- Gerontology
Background:
- Osteoporosis prevention involves lifestyle behaviors like physical activity and calcium intake.
- Measuring self-efficacy, or confidence, is crucial for understanding adherence to these behaviors.
- Existing measures may not adequately capture self-efficacy for osteoporosis prevention specifically.
Purpose of the Study:
- To develop and validate the Osteoporosis Self-Efficacy Scale (OSES).
- To assess confidence in performing osteoporosis-preventive behaviors related to physical activity and calcium intake.
- To provide a psychometrically sound instrument for research.
Main Methods:
- Item pool generation and expert review.
- Testing with a sample of 201 women (ages 35-95).
- Factor analysis, internal consistency, convergent/discriminant validity, and regression analyses.
Main Results:
- A two-factor structure emerged: physical activity and calcium intake.
- High internal consistency (Cronbach's alpha in the .90s) for both factors.
- Validity analyses supported the scale's ability to measure self-efficacy for osteoporosis prevention.
Conclusions:
- The Osteoporosis Self-Efficacy Scale is a brief, reliable, and valid measure.
- It assesses self-efficacy for initiating, maintaining, and persisting in preventive behaviors.
- The OSES is a potentially beneficial research instrument for osteoporosis prevention studies.