Seventeen studies were included in the review. The total number of participants was not reported. Two studies were judged as strong quality, five studies as weak quality, and ten studies as moderate quality.
Eleven out of the seventeen studies reported results in favour of family-targeted intervention effectiveness. Of six studies that evaluated an obesity prevention intervention, three studies reported that the intervention was associated with a significant benefit on weight status. One study targeting coronary risk factors reported a significant decrease in the cholesterol levels of children in the intervention group.
Only two out of the ten studies reported that interventions were associated with a significant dietary change for reduced fat intake. Four studies reported that interventions aimed at reducing energy intake to prevent excess weight gain were associated with a significant benefit. Only one out of the six studies (including a measure of physical activity) showed that interventions were associated with a significant change in the activity level in children.
Of eleven studies with results favoured intervention effectiveness, six studies included behaviour change techniques covering the spectrum of behaviour change process. A number of behavioural change techniques appeared more frequently in effective interventions, including prompt barrier identification, restructure home environment, prompt self-monitoring and prompt specific goal setting.