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Mechanisms of patient health behavior change in a randomized controlled trial of a spouse-assisted intervention.

Publication ,  Journal Article
McVay, MA; King, HA; Jeffreys, AS; Coffman, CJ; Voils, CI
Published in: Psychol Health Med
2015

Spouse-assisted interventions can improve health behaviors, but mechanisms of action are unknown. This study evaluated mediators of dietary and physical activity outcomes during a spouse-assisted intervention to improve low-density lipoprotein cholesterol. This is a secondary analysis of data from a randomized controlled trial comparing usual care (n = 128) to a spouse-assisted lifestyle change intervention (n = 127) comprising nine monthly goal setting telephone calls to participants and support planning calls to spouses over 11 months. Structural equation modeling was used to examine if the intervention influenced the putative mediators of participant self-efficacy and perceived spousal support at 6 months (i.e. action test); if changes in putative mediators at 6 months were associated with changes in diet and physical activity outcomes at 11 months (i.e. conceptual test); and if treatment condition effects on outcomes at 11 months were mediated by its effects on the 6-month putative mediators (i.e. indirect effects test). Participants were 94.9% male, 64.9% white and were 61.3 years old on average. The action test showed that the intervention increased dietary self-efficacy (p < .001) and perceived spousal support for diet (p < .001) and physical activity (p < .01) at 6 months. The conceptual test showed that increases in participant physical activity self-efficacy at 6 months were associated with increases in physical activity frequency (p = .01) and duration (p = .04) at 11 months; other putative mediators were not associated with changes in outcomes at 11 months. The indirect effects tests did not support a mediating role for self-efficacy or perceived spousal support. Intervention-induced changes in spousal support and dietary self-efficacy did not translate into behavior change. Other mechanisms may be driving behavior change.

Duke Scholars

Published In

Psychol Health Med

DOI

EISSN

1465-3966

Publication Date

2015

Volume

20

Issue

7

Start / End Page

753 / 766

Location

England

Related Subject Headings

  • Spouses
  • Social Support
  • Social Perception
  • Self Efficacy
  • Public Health
  • Middle Aged
  • Male
  • Life Style
  • Humans
  • Health Behavior
 

Citation

APA
Chicago
ICMJE
MLA
NLM
McVay, M. A., King, H. A., Jeffreys, A. S., Coffman, C. J., & Voils, C. I. (2015). Mechanisms of patient health behavior change in a randomized controlled trial of a spouse-assisted intervention. Psychol Health Med, 20(7), 753–766. https://doi.org/10.1080/13548506.2015.1020817
McVay, Megan A., Heather A. King, Amy S. Jeffreys, Cynthia J. Coffman, and Corrine I. Voils. “Mechanisms of patient health behavior change in a randomized controlled trial of a spouse-assisted intervention.Psychol Health Med 20, no. 7 (2015): 753–66. https://doi.org/10.1080/13548506.2015.1020817.
McVay MA, King HA, Jeffreys AS, Coffman CJ, Voils CI. Mechanisms of patient health behavior change in a randomized controlled trial of a spouse-assisted intervention. Psychol Health Med. 2015;20(7):753–66.
McVay, Megan A., et al. “Mechanisms of patient health behavior change in a randomized controlled trial of a spouse-assisted intervention.Psychol Health Med, vol. 20, no. 7, 2015, pp. 753–66. Pubmed, doi:10.1080/13548506.2015.1020817.
McVay MA, King HA, Jeffreys AS, Coffman CJ, Voils CI. Mechanisms of patient health behavior change in a randomized controlled trial of a spouse-assisted intervention. Psychol Health Med. 2015;20(7):753–766.

Published In

Psychol Health Med

DOI

EISSN

1465-3966

Publication Date

2015

Volume

20

Issue

7

Start / End Page

753 / 766

Location

England

Related Subject Headings

  • Spouses
  • Social Support
  • Social Perception
  • Self Efficacy
  • Public Health
  • Middle Aged
  • Male
  • Life Style
  • Humans
  • Health Behavior