The effectiveness of group-based, parent-only weight management interventions for children and the factors associated with outcomes: a systematic review

Background: Obesity in Childhood is a significant public health issue, which requires both a preventative and treatment approach. International guidelines continue to recommend family-focused, multicomponent, childhood weight management programmes and many studies have investigated their effectiveness, however, findings have been mixed and primarily based on weight. Thus, the aim of this review was to assess the effectiveness of group-based parent-only interventions on a broad range of child health-related outcomes and to investigate the factors associated with intervention outcomes. Methods: An electronic database search was conducted using CINAHL, Medline, PsychINFO, Embase and the Cochrane Database of Systematic Reviews: 522 articles were identified for full text review and 15 studies were selected. The quality of studies were appraised and data were synthesised according to the review aims. Results: Parent-only group interventions are effective in changing children's weight status, as well as other outcomes such as health behaviours and self-esteem, although these were reported inconsistently. Parent-only interventions were generally found to be similar to parent-child interventions, and minimal contact interventions but better than a waiting list control. Factors found to be associated with treatment outcomes, included session attendance, the child's age and weight at baseline, socioeconomic status of families and modification to the home food environment. The methodological quality of the studies included in the review was low, with only six studies rated to be methodologically adequate. Conclusions: Parent-only interventions may be an effective treatment for improving the health status of children and their families, particularly when compared with waitlist controls. However, results need to be interpreted with caution due to the low quality of the studies and the high rates of non-completion.