Nahar VK, Wilkerson AH, Stephens PM, Kim RW, Sharma M. Using the Multitheory Model to Predict Initiation and Sustenance of Physical Activity Behavior Among Osteopathic Medical Students. J Am Osteopath Assoc 2019;119(8):479–487. doi: 10.7556/jaoa.2019.089.
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The multitheory model (MTM) is a newly developed fourth-generation theoretical framework that addresses both initiation and sustenance of health behavior change. Studies have shown that the MTM is efficacious in predicting a range of health behaviors.
To assess the utility of the MTM in predicting initiation and sustenance of physical activity behavior among osteopathic medical students.
In this cross-sectional study, a volunteer convenience sample was recruited from an osteopathic medical school student population at a university in the southeastern region of the United States. An online survey was used to collect self-reported data on sociodemographic information and MTM constructs. Multiple linear regression using the enter method for modeling was performed to determine the predictive ability of the MTM constructs.
Of the 135 participants, 52.6% were women and 67.7% were white. The initiation model explained 25.8% of the variance (adjusted R2=0.238). Behavioral confidence was a statistically significant predictor of initiation of physical activity behavior change. The sustenance model explained 41.7% of the variance (adjusted R2=0.402). Changes in social environment and emotional transformation were statistically significant predictors of sustenance of physical activity behavior change.
The MTM appears to be a robust theoretical framework for designing behavior change interventions to increase physical activity among osteopathic medical students.
a All items of initiation scale.
b All items of sustenance scale.
c All items of initiation and sustenance scales.
a The dependent variable is initiation for physical activity behavior change. The independent variables are participatory dialogue, behavioral confidence, and changes in physical environment (P<.001; R2=0.258; adjusted R2=0.238; F3,116=13.414).
Abbreviations: B, unstandardized coefficient; SEB, standard error of the coefficient.
a The dependent variable is sustenance for physical activity behavior change. Independent variables are changes in social environment, practice for change, and emotional transformation (P<.001; R2=0.417; F(3, 114)=27.194; adjusted R2=0.402).
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