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Longitudinal Research

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Related Experiment Videos

Predictors of calcium intake patterns: a longitudinal analysis.

Susan J Blalock1

  • 1School of Pharmacy, University of North Carolina, Chapel Hill, NC 27599-7360, USA. s_blalock@unc.edu

Health Psychology : Official Journal of the Division of Health Psychology, American Psychological Association
|May 16, 2007
PubMed
Summary

Understanding calcium intake behavior change is key. Higher knowledge and perceived benefits support occasional adequate intake, while lower perceived difficulty aids long-term maintenance in women.

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Area of Science:

  • Behavioral science
  • Health psychology
  • Nutrition science

Background:

  • The Precaution Adoption Process Model (PAPM) provides a framework for understanding health behavior change.
  • Calcium intake is crucial for women's health, yet patterns of adequate consumption vary significantly.

Purpose of the Study:

  • To examine factors influencing stage of change and patterns of calcium intake over one year in women.
  • To assess the utility of the PAPM in explaining calcium intake behavior.

Main Methods:

  • Longitudinal study design with mailed questionnaires administered at baseline and three follow-up points over one year.
  • Participants (N=506 at baseline, N=346 completing follow-ups) reported on calcium intake and stage of change.
  • Calcium intake patterns were categorized as successful maintenance, vacillation, or inertia.

Main Results:

  • Three distinct calcium intake patterns were identified: successful maintenance, vacillation, and inertia.
  • Higher knowledge and perceived benefits predicted isolated instances of adequate calcium intake.
  • Lower perceived difficulty was a significant predictor of long-term successful maintenance of adequate calcium intake.

Conclusions:

  • Findings support the PAPM's premise that different psychological factors influence distinct stages of behavior change.
  • Knowledge and perceived benefits are important for initiating adequate calcium intake, while perceived difficulty is critical for sustained behavior.