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Randomized Controlled Trial
. 2011 Jul;30(4):432-41.
doi: 10.1037/a0023084.

Does tailoring on additional theoretical constructs enhance the efficacy of a print-based physical activity promotion intervention?

David M Williams  1 , George D Papandonatos, Ernestine G Jennings, Melissa A Napolitano, Beth A Lewis, Jessica A Whiteley, Beth C Bock, Anna E Albrecht, Shira Dunsiger, Alfred F Parisi, Abby C King, Bess H Marcus
Affiliations
Randomized Controlled Trial

Does tailoring on additional theoretical constructs enhance the efficacy of a print-based physical activity promotion intervention?

David M Williams et al. Health Psychol. 2011 Jul.

Abstract

Objective: To enhance a previously efficacious individually tailored physical activity (PA) promotion intervention by adding theoretical constructs to the tailored feedback.

Design: We randomly assigned 248 healthy, underactive (moderate to vigorous physical activity [MVPA] min/week < 90) adults (mean age = 48.8 years, SD = 10.0) to receive either (a) a theoretically tailored (based on 5 constructs from the transtheoretical model and social-cognitive theory [SCT]) print-based PA promotion intervention (print) or (b) the same theoretically tailored print-based PA promotion intervention plus enhanced tailoring addressing 5 additional SCT constructs (enhanced print).

Main outcome measure: The 7-day physical activity recall administered at baseline, Month 6, and Month 12, with outcomes operationalized as percentage achieving 150 min/week of MVPA.

Results: When controlling for covariates, there was a nonsignificant trend in favor of the enhanced print condition reflecting 46% and 50% greater odds of achieving 150 min/week of MVPA at Month 6 and Month 12, respectively.

Conclusion: Enhanced tailoring based on additional theoretical constructs may result in marginal improvements in physical activity outcomes.

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Figures

Figure 1
Figure 1
Participant Flow Chart.
Figure 2
Figure 2
Theory-Based Features Included in the Enhanced Print-Based Intervention.
Figure 2
Figure 2
Theory-Based Features Included in the Enhanced Print-Based Intervention.
Figure 3
Figure 3
Crude Percentage of Study Completers Achieving ≥ 150 Min/Week MVPA. At month 6, Enhanced Print > Print (42% vs. 35%, p=0.338); at month 12, Enhanced Print > Print (35% vs. 29%, p=0.415)
See this image and copyright information in PMC

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