No treatment guidelines for maintenance of weight were identified, although several guidelines and systematic reviews exist for weight loss or maintenance of weight after weight loss.33-38 Only one previous review with a meta-analysis aimed to study obesity prevention as an outcome. The review was conducted as background for a study on the impact of cancer prevention interventions on obesity prevention.31 The primary outcome of interest for the meta-analysis was the difference in change in BMI or body weight between the intervention and control groups among studies published in 1998–2008.
A recent Cochrane review examined workplace-based diet and physical activity interventions and change in BMI from baseline among nonobese and obese employees. The investigators found that the interventions decreased weight by 2.8 pounds, on average, at 6–12 months of follow-up and that BMI decreased by 0.5 kg/m2. The findings are reported as recommendations to implement workplace interventions for controlling overweight and obesity in the Task Force on Community Preventive Services