Motivational Interviewing for Weight Loss

NCT01246349 | Completed Results

• 1 other identifier: 1000017625
• Study Type: interventional
• Target: 40
• Locations: 1 country
• Sites: 1

Brief Summary

The investigators studied the effect of motivational interviewing (MI) on self-efficacy, health behaviors, and health outcomes in overweight children and adolescents (ages ranging from 10 to 18 years).

Conditions

Childhood Obesity

Keywords

Motivational Interviewing; Child and Adolescent Self-Efficacy; Health Behaviours

Outcome Measures

Primary Outcomes (2)

• Weight Efficacy Life-style Questionnaire

  A self-efficacy instrument, the Weight Efficacy Life-style Questionnaire (WEL; Clark, Abrams, Niaura, Eaton, \& Rossi, 1991) was used to measure participants' beliefs about and confidence in their own ability to make a behavior change, specifically their ability to lose weight. The questionnaire yields a total score, with higher scores indicating higher levels of health-related self-efficacy, as well as 5 situational sub-scores (negative emotions, availability, social pressure, physical discomfort, and positive activities). Individuals rate statements on a 10-point scale ranging from 0 (not confident) to 9 (very confident). The WEL is made up of 20 items (4 items per sub-scale) which are summed to obtain a total score, with the lowest total score possible being 0 and the highest 180. Only the total WEL score was used in the study's analyses. The difference in self-efficacy (WEL) change between treatment and control groups from baseline to a 6 month follow-up was examined.

  Baseline, 6 month follow-up

• Child Dietary Self-Efficacy Scale

  A second self-efficacy scale, the Child Dietary Self-Efficacy Scale (CDSS; Parcel et al., 1995) was used to measure participants' confidence in their ability to choose lower fat, lower sodium foods. The questionnaire is made up of 20 likert items with 3 response options, including "not sure", "a little sure", and "very sure". Each item asks the participant to indicate how sure he/she is that they would make a healthy choice, for example, "How sure are you that you could eat cereal instead of a donut?" Individual items are scored -1, 0, or 1 and subsequently summed for a total score, with the lowest possible score a -20 and the highest a 20, whereby higher scores signify higher dietary self efficacy.

  Baseline, 6 month follow-up

Secondary Outcomes (3)

• Physiological Outcomes: BMI

  Baseline, 6 month follow-up

• Physiological Outcomes: Waist Circumference

  Baseline, 6 month follow-up

• Psychological Well-being

  Change over time from Baseline to 6 months (measured monthly) with a 12 months reassessment

Study Arms (2)

Motivational Interviewing Group

EXPERIMENTAL

For the Motivational Interviewing (MI) treatment group, a clinical psychology doctoral student trained in Motivational Interviewing administered six individual motivational interviewing treatment sessions, each 30 minutes in length.

Behavioral: Motivational Interviewing (Treatment Group)

Control Group

ACTIVE COMPARATOR

The comparison group received six social skills training sessions instead of Motivational Interviewing (MI).

Behavioral: Social Skills Training (Control Group)

Interventions

Motivational Interviewing (Treatment Group) BEHAVIORAL

Motivational interviewing (MI) can be defined as a client-centered, directive method of therapy for enhancing intrinsic motivation to change by exploring and resolving ambivalence (Miller and Rollnick, 2002). MI manifests through specific strategies, such as reflective listening, summarization, shared decision making, and agenda setting.

Motivational Interviewing Group

Social Skills Training (Control Group) BEHAVIORAL

Within the social skills training framework, advice is given to clients and sessions are focused on assigning goals for clients to work towards without specific regard for their readiness to change. The intervention is aimed at finding appropriate ways to navigate typical social situations (e.g., how to negotiate with parents).

Control Group

Eligibility Criteria

• Age: 10 Years - 18 Years
• Sex: all
• Healthy Volunteers: No
• Age Groups: Child (0-17), Adult (18-64)

You may qualify if:

• Obese youth (with Body Mass Index (BMI) ≥ to 85th percentile for age and gender (as classified by the Center for Disease Control))
• ages 10-18 years
• attending a local obesity clinic ("Healthy Weights" clinic)
• Time of entry into the weight-loss program was controlled for; however, both new and current participants had the option to participate in the study.

You may not qualify if:

• taking medication whose side effects may influence weight gain or weight loss
• did not speak English
• demonstrated a developmental delay
• reported being pregnant and/or reported having an eating disorder

Sponsors & Collaborators

• The Hospital for Sick Children: lead

Study Sites (1)

The Hospital for Sick Children

Toronto, Ontario, Canada

Location

MeSH Terms

Conditions

Pediatric Obesity

Interventions

Motivational Interviewing; Control Groups

Condition Hierarchy (Ancestors)

Obesity; Overweight; Overnutrition; Nutrition Disorders; Nutritional and Metabolic Diseases; Body Weight; Signs and Symptoms; Pathological Conditions, Signs and Symptoms

Intervention Hierarchy (Ancestors)

Directive Counseling; Counseling; Mental Health Services; Behavioral Disciplines and Activities; Health Services; Health Care Facilities Workforce and Services; Epidemiologic Research Design; Epidemiologic Methods; Investigative Techniques; Research Design; Methods

Results Point of Contact

• Title: Beverly Walpole
• Organization: The Hospital for Sick Children

bwalpole@uoguelph.ca

416. 813 7654

Study Officials

• Jill Hamilton, MD

  The Hospital for Sick Children

  PRINCIPAL INVESTIGATOR

Publication Agreements

• PI is Sponsor Employee: No
• Restrictive Agreement: No

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: SINGLE
• Who Masked: PARTICIPANT
• Purpose: TREATMENT
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Staff Endocrinologist

Study Record Dates

• First Submitted: November 11, 2010
• First Posted: November 23, 2010
• Study Start: September 1, 2010
• Primary Completion: July 1, 2012
• Study Completion: November 1, 2012
• Last Updated: November 17, 2017
• Results First Posted: April 21, 2014

Record last verified: 2017-11

Locations

CA (1)