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Randomized Controlled Trial
. 2015 Apr;10(2):118-25.
doi: 10.1111/j.2047-6310.2014.226.x. Epub 2014 Apr 14.

Motivational interviewing targeting diet and physical activity improves adherence to paediatric obesity treatment: results from the MI Values randomized controlled trial

M K Bean  1 , P Powell, A Quinoy, K Ingersoll, E P Wickham 3rd, S E Mazzeo
Affiliations
Randomized Controlled Trial

Motivational interviewing targeting diet and physical activity improves adherence to paediatric obesity treatment: results from the MI Values randomized controlled trial

M K Bean et al. Pediatr Obes. 2015 Apr.

Abstract

Background: Adherence is a challenge in obesity treatment. Motivational interviewing (MI) may promote patient adherence. MI Values is a randomized controlled trial of MI implemented as an adjunct to an adolescent obesity treatment [Teaching Encouragement Exercise Nutrition Support (T.E.E.N.S.)].

Objective: Assess effects of MI Values on T.E.E.N.S. attrition and adherence.

Methods: Participants were randomized to MI (n = 58) or control (n = 41). At weeks 1 and 10, MI participants had brief MI sessions; controls viewed health education videos. All participants continued with T.E.E.N.S. (biweekly dietitian and behavioural support visits; 3 times per week supervised physical activity). Assessments were repeated at baseline, 3 and 6 months. T-tests and chi-square analyses examined T.E.E.N.S. attrition and adherence by group.

Results: Adolescents (N = 99) were primarily African-American (73%) females (74%); age = 13.8 ± 1.8 years, body mass index percentile = 98.0 ± 1.2. Compared with controls, MI participants had greater 3-month adherence overall (89.2% vs. 81.0%, P = 0.040), and to dietitian (91.3% vs. 84.0%; P = 0.046) and behavioural support (92.9% vs. 85.2%; P = 0.041) visits, and greater 6-month adherence overall (84.4% vs. 76.2%, P = 0.026) and to behavioural support visits (87.5% vs. 78.8%, P = 0.011).

Conclusions: MI enhanced adherence to this obesity intervention. MI Values is the first study to examine the impact of MI on treatment adherence among obese, primarily African-American adolescents.

Keywords: Motivational interviewing; paediatric obesity; treatment adherence.

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Conflict of interest statement

Conflict of Interest Statement

The authors have no conflicts of interest to report.

Figures

Figure 1
Figure 1
Three Month Adherence with T.E.E.N.S. Program Activities by Treatment Group Note: Percentage of visits attended was calculated by dividing the number of visits attended by the participant by the total number of potential visits. At 3-months, the maximum number of sessions was: 6 nutrition, 6 behavior support, and 36 gym visits. P values represent results of independent samples t-tests. Effect sizes (Cohen’s d) are as follows: aTotal Adherence = 0.44; bNutrition = 0.41; cBehavioral Support = 0.43; dGym = 0.20.
Figure 2
Figure 2
Six Month Adherence with T.E.E.N.S. Program Activities by Treatment Group Note: Percentage of visits attended was calculated by dividing the number of visits attended by the participant by the total number of potential visits. At 6-months, the maximum number of session was: 12 nutrition, 12 behavior support, and 62 gym visits. P values represent results of independent samples t-tests. Effect sizes (Cohen’s d) are as follows: aTotal Adherence = 0.49; bNutrition = 0.29; cBehavioral Support = 0.55; dGym = 0.28.
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