Increasing calcium intake in young women through gain-framed,targeted messages: A randomised controlled trial |
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| Authors: | Mary E Jung Kathleen A Martin Ginis Stuart M Phillips Carolyn D Lordon |
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| Institution: | 1. University of Western Ontario, Health Sciences , Thames Hall, London, Ontario, N6A 5B9 Canada;2. McMaster University, Kinesiology, Ivor Wynne Centre , Hamilton, Ontario, L8S 4K1 Canada mjung32@uwo.ca;4. McMaster University, Kinesiology, Ivor Wynne Centre , Hamilton, Ontario, L8S 4K1 Canada;5. College of Dietitians of Ontario , 5775 Yonge Street, Suite 1810, Box 30, Toronto, Ontario, M2M 4J1 Canada |
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| Abstract: | Background: Adequate calcium consumption during early adulthood can help prevent osteoporosis in women. Purpose: The effects of gain-framed, targeted messaging on calcium intake were examined over 12 months. Methods: Young women (18–19 years) not consuming sufficient calcium were randomly assigned to receive standard care materials (control) or gain-framed, targeted materials (experimental). Health belief model (HBM) constructs, calcium intake and markers of bone formation, resorption and bone mineral density were assessed at various time points throughout the year. Results: Calcium intake increased significantly more in the experimental versus the control condition (p?<?0.01). Self-efficacy was the only HBM construct to improve significantly more in the experimental condition versus control (p?=?0.05). The HBM did not mediate changes in calcium intake. Measures of bone health did not differ between conditions by the end of this nonpharmacological intervention (p's?>?0.05). Conclusions: It is possible to increase young women's calcium consumption through gain-framed, targeted messages. |
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| Keywords: | calcium consumption message framing health belief model |
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