Adapting family-based treatment for paediatric obesity: A randomized controlled pilot trial.

OBJECTIVE: This pilot study aimed to refine and test an adaption of family-based treatment (FBT) for eating disorders that addressed the distinct clinical needs of adolescents with overweight or obesity in the absence of eating disorder pathology. Our hypothesis was that FBT for paediatric obesity (FBT-PO) would be feasible to implement and superior to a nutrition education counselling (NEC) condition delivered to both parents and patients, thereby controlling for key information dissemination across groups while manipulating active therapeutic content and strategy. METHOD: Seventy-seven adolescents were randomized to FBT-PO or NEC across two sites. RESULTS: Results supported our core prediction, in that weight status among adolescent study participants receiving FBT-PO remained stable while increasing among participants randomized to NEC. Attrition was high in both conditions. CONCLUSIONS: FBT-PO, while not seeming to yield a marked decrease in body mass index z-score, may arrest an otherwise-occurring weight-gain trajectory for these adolescents. This efficacy finding is consistent with the overall PO literature supporting parental involvement in the treatment of PO. Future research efforts should address retention in FBT-PO.

Anxiety in anorexia nervosa and its management using family-based treatment.

Anorexia nervosa (AN) is characterized by its similarity to anxiety disorders, especially obsessive-compulsive disorder (OCD). Family-based treatment (FBT) has shown promising initial results for treatment of AN in adolescents, yet the precise mechanisms of action are unknown. We present a theoretical argument and model, suggesting that FBT may work via exposure (and habituation) to food and its consumption. First, we review the evidence for pathological anxiety in AN, and suggest a framework for identifying specific anxious triggers, emotions (fear and worry) and avoidance strategies. Second, we briefly review evidence indicating that cognitive-behavioural therapy (CBT) and specifically exposure in its various forms is most effective for treating anxiety disorders in youth. Third, we consider distinct approaches to exposure therapy based on the pattern of triggers, anxious emotions and avoidance. We conclude that the interventions utilized in FBT share clear similarities to exposure with response prevention, a type of exposure therapy commonly used with OCD, and may work via facilitating habituation to food and eating in one's natural environment. We also highlight how parents facilitate this process in between sessions by effectively coaching their children and facilitating naturalistic exposure to food and related triggers. Options for future research are considered.

Are there specific metacognitive processes associated with anxiety disorders in youth?

While Wells' metacognitive model of generalized anxiety disorder (GAD) posits that certain metacognitive processes, such as negative meta-worry (negative beliefs about worry), are more strongly associated with symptoms of GAD than other anxiety disorders in adults, research has yet to determine whether the same pattern is true for younger individuals. We examined the relationship between several metacognitive processes and anxiety disorder diagnostic status in a sample of 98 youth aged 7-17 years. Twenty youth with GAD were compared with similarly sized groups of youth with obsessive-compulsive disorder (OCD, n = 18), social phobia (SOC, n = 20), separation anxiety disorder (SAD, n = 20), and healthy controls who were not patients (NONP, n = 20) using a self-report measure of metacognition adapted for use with young people in this age range (Metacognitions Questionnaire for Children). Contrary to expectations, only one specific metacognitive process was significantly associated with an anxiety disorder diagnosis, in that the controls endorsed a greater degree of cognitive monitoring (self-reported awareness of one's thoughts) than those with SAD. In addition, there was a trend indicating that nonpatients scored higher than youth with GAD on this scale. These surprising results suggest potentially differing patterns in the relationships between symptoms and metacognitive awareness in anxious youth, depending on the type of anxiety disorder presentation.

The metacognitions questionnaire for children: development and validation in a clinical sample of children and adolescents with anxiety disorders.

A self-report measure of metacognition for both children and adolescents (ages 7-17) (Metacognitions Questionnaire for Children; MCQ-C) was adapted from a previous measure, the MCQ-A (Metacognitions Questionnaire for Adolescents) and was administered to a sample of 78 children and adolescents with clinical anxiety disorders and 20 non-clinical youth. The metacognitive processes included were (1) positive beliefs about worry (positive meta-worry); (2) negative beliefs about worry (negative meta-worry); (3) superstitious, punishment and responsibility beliefs (SPR beliefs) and (4) cognitive monitoring (awareness of one's own thoughts). The MCQ-C demonstrated good internal-consistency reliability, as well as concurrent and criterion validity, and four valid factors. In line with predictions, negative meta-worry was significantly associated with self-reports of internalizing symptoms (excessive worry and depression). Age-based differences on the MCQ-C were found for only one subscale, with adolescents reporting greater awareness of their thoughts than children. Adolescent girls scored higher on the total index of metacognitive processes than adolescent boys. Overall, these results provide preliminary support for the use of the MCQ-C with a broader age range as well as an association between metacognitive processes and anxiety symptomatology in both children and adolescents, with implications for cognitive behavioral interventions with anxious youth.