Types of studies—We included randomised controlled trials or cluster randomised controlled trials with participants randomised to a weight maintenance intervention compared with a control condition or another intervention, or both, and ≥12 months’ follow-up of weight outcomes from inception of the maintenance intervention.
Types of participants—Participants were adults (aged ≥18, no upper age limit) who had, or had had, an average BMI of ≥30 and lost ≥5% of their body weight/mass within 24 months before weight loss maintenance treatment. We excluded studies that recruited participants with established mental health conditions, including eating disorders, and conditions requiring treatment with antipsychotic drugs.
Type of interventions—Any behavioural/lifestyle, pharmacological (with European Medicines Agency approval for weight loss), food replacement/supplement, or alternative interventions, singly or in combination were included. We excluded surgical interventions.
Types of outcomes—Primary outcome was weight at 12 months from randomisation to the weight loss maintenance intervention. Weight could be reported as absolute weight change during the trial including the weight loss phase, weight change during the maintenance treatment period, or final weight values.
Types of reports—Full text reports in any language from 1946 to January 2014.
Types of participants—Participants were adults (aged ≥18, no upper age limit) who had, or had had, an average BMI of ≥30 and lost ≥5% of their body weight/mass within 24 months before weight loss maintenance treatment. We excluded studies that recruited participants with established mental health conditions, including eating disorders, and conditions requiring treatment with antipsychotic drugs.
Type of interventions—Any behavioural/lifestyle, pharmacological (with European Medicines Agency approval for weight loss), food replacement/supplement, or alternative interventions, singly or in combination were included. We excluded surgical interventions.
Types of outcomes—Primary outcome was weight at 12 months from randomisation to the weight loss maintenance intervention. Weight could be reported as absolute weight change during the trial including the weight loss phase, weight change during the maintenance treatment period, or final weight values.
Types of reports—Full text reports in any language from 1946 to January 2014.
