Motivational Interviewing as an Intervention to Increase Adolescent Self-Efficacy and Promote Weight Loss
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 40
- 试验地点
- 1
- 主要终点
- Child Dietary Self-Efficacy Scale
研究概览
简要总结
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).
详细描述
One empirically supported intervention with a large evidence base for improving adult outcomes in behavioral health-related disorders is Motivational Interviewing (MI). MI is strongly rooted in the client-centered therapy of Rogers (1951). Its relational stance emphasizes the importance of understanding the client's internal frame of reference and displaying unconditional positive regard for the client. Motivational interviewing can thus be defined as a client-centered, directive method of therapy for enhancing intrinsic motivation to change by exploring and resolving ambivalence. MI manifests through specific strategies, such as reflective listening, summarization, shared decision making, and agenda setting.
Adolescent participants exposed to motivational interviewing in conjunction with usual care (diet and exercise program) are expected to endorse greater self-efficacy, report increased engagement in healthy behaviors, demonstrate a decrease in body weight and report improved psychological outcomes. While motivational interviewing has been shown to increase adults' motivation to make healthy behavior changes, few adolescent studies have demonstrated this effect.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Treatment
- 盲法
- Single (Participant)
入排标准
- 年龄范围
- 10 Years 至 18 Years（Child, Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •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.
排除标准
- •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
结局指标
主要结局
Child Dietary Self-Efficacy Scale
时间窗: Baseline, 6 month follow-up
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.
Weight Efficacy Life-style Questionnaire
时间窗: Baseline, 6 month follow-up
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.
次要结局
- 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)
研究者
Jill Hamilton
Staff Endocrinologist
The Hospital for Sick Children