Study designs of evaluations included in the review
To be eligible, studies had to be randomised controlled trials (RCTs). Trials of less than one year’s duration were excluded.
Specific interventions included in the review
Specific weight-loss interventions were not pre-specified. Trials had counselling on diet and/or, exercise and/or behavioural components. The duration of the studies ranged from 12 to 48 months.
Participants included in the review
Data on patients aged 60 years and older were considered. Most studies were of U.S. samples with participants who were generally healthy and in their 60s.
Outcomes assessed in the review
Outcomes eligible were reductions in morbidity and mortality, improvements in quality of life and function, and intermediate cardiovascular outcomes such as glucose control, blood-pressure and lipid levels.
How were decisions on the relevance of primary studies made?
At least two authors independently assessed the relevance of each study.