Pediatric Obesity Clinical Trial
Official title:
The Readiness and Motivation Interview for Families (RMI-Family) Managing Pediatric Obesity
Approximately one-third of Canadian children have excess weight, putting them at increased risk of type 2 diabetes, cardiovascular disease, bone and joint problems, and some forms of cancer. Because current therapies for managing obesity have modest success, there is a need to develop and test innovative strategies to enhance pediatric weight management. Using a novel interview designed to measure motivation to change lifestyle habits, interviewers will conduct separate and structured 1-on-1 interviews with youth with obesity and parents. By applying principles of motivational interviewing, trained interviewers will ask youth and their parents about their motivation to change lifestyle habits related to diet and physical activity. Subsequently, interview data will be used to examine predictors of clinically-meaningful outcomes over time, including changes in weight status, lifestyle habits, health care utilization, and attrition. The investigators will also measure a number of variables related to weight management, including dietary intake, physical activity, anthropometry, and psychosocial health.
The Readiness and Motivation Interview for Families (RMI-Family) was created as a structured interview for assessing youth and parent motivation (and within family member agreement) regarding lifestyle changes in pediatric weight management. The RMI-Family was modeled on the Readiness and Motivation Interview (RMI), which was developed originally for use in the management of eating disorders (e.g., anorexia nervosa) and emerged as a 'gold standard' approach to assessing treatment motivation in that population. The RMI-Family was based on the tenets of motivational interviewing (MI), a directive, client-centered, and empirically-supported clinical approach to helping individuals resolve ambivalence about change across a range of lifestyle behaviours, including smoking, substance abuse, as well as diet and physical activity. Participants will be recruited and enrolled into the study after being referred for pediatric weight management within Alberta Health Services, the governmental authority responsible for providing health care in the province of Alberta, Canada. Interviews will be completed following referral and before youth and parents initiative pediatric weight management. Each youth and parent will complete the RMI-Family (interview duration: 60 - 90 minutes) at baseline, 6-, and 12-months post-baseline. Individual (i.e., youth or parent) and family-level (i.e., across youth and parent) responses to interview questions will be scored, as will aspects of interview administration (e.g., fidelity to motivational interviewing tenets). Families (youth+parent) will also complete the following questionnaires at baseline, 6- and 12-months follow-up: 1. Behavior Assessment System for Children-Third Edition (BASC-3) 2. Behavior Rating Inventory of Executive Function-Second Edition (BRIEF 2) 3. Emotion Regulation Questionnaire (ERQ) 4. Coping with Children's Negative Response Scale (CCNES) 5. Marlowe-Crowne Social Desirability Scale (MC-SDS) 6. Motivation to Change Rulers (Readiness to change lifestyle habits) 7. Waterloo Eating Behaviour Questionnaire (WEB-Q) 8. Dutch Eating Behaviour Questionnaire (DEBQ) Physical activity will be measured for youth over a 7-day period using accelerometry, which will provide estimates of total movement time (and movement intensity) and sleep. Data regarding demography (e.g., gender, date of birth), anthropometry (e.g., height, weight), health services utilization (e.g., number of clinic appointments, length of appointments), and program attrition will be retrieved from medical records. To ensure research team members who administer the RMI-Family interview adhere to principles of motivational interviewing (MI) (e.g., express and show empathy, roll with resistance, support autonomy, take curious and non-judgmental approach), the investigators implemented a number of training procedures before the study launched in fall, 2017. First, as background, all interviewers received and reviewed a package of information and resources (including sample videos) regarding MI, which covered a range of theoretical and practical issues. Second, all interviewers completed practice interviews using the RMI-Family with friends or colleagues that were audio-recorded for their own practice and self-reflection. Third, interviewers completed and audio-recorded 2 - 3 formal interviews (youth and parent versions), which were subsequently reviewed and evaluated by senior research team members with advanced training and expertise in psychology, counseling, and MI. Interviewers received feedback (both positive and constructive) about their interviews; when deemed necessary, interviewers completed additional interviews to build competence and skill, which were also reviewed by senior team members until they were confident that a similar and high level of proficiency was achieved by all interviewers. To ensure interviewers maintain a high level of competence in administering the RMI-Family interview, all youth and parent interviews will be recorded (audio only) over the course of this study. After each interviewer completes 5 interviews, he/she will submit a randomly-selected interview for review by research team members to ensure implementation fidelity. To assess fidelity, the investigators will use the Motivational Interviewing Supervision and Training Scale (MISTS), which provides a behavioural count of interviewers' skills consistent with the principles of MI and assess the quality and fidelity with which the interview is administered. Subsequently, interviewers and reviewers will discuss issues related to clinical interactions and conversations; this formative approach is designed to optimize adherence to the MI interviewing practices over the course of the study. ;
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