Context
Binge eating (BE) is common in overweight and obese individuals with type 2 diabetes yet little is known about how BE affects weight loss in this population.
Objective
To determine whether BE was related to 1-year weight losses in overweight and obese individuals with type 2 diabetes participating in an ongoing clinical trial.
Design and Setting
Look AHEAD is a randomized controlled trial examining the long-term effect of intentional weight loss on CVD in overweight and obese adults with type 2 diabetes.
Participants
Overweight and obese individuals, 45–76 years old, with type 2 diabetes (n=5145).
Interventions
Participants were randomly assigned to an intensive lifestyle intervention (ILI) or to enhanced usual care (DSE).
Main outcome measures
At baseline and 1-year, participants had their weight measured and completed a fitness test and self-report measures of BE and dietary intake. Four groups were created based on BE status at baseline and 1-year (Yes/Yes, No/No, Yes/No, No/Yes). Analyses controlled for baseline differences between binge eaters and non-binge eaters.
Results
Most individuals (85.4%) did not report BE at baseline or 1-year, 7.5% reported BE only at baseline, 3.7% reported BE at both times, and 3.4% reported BE only at 1-year, with no differences between ILI and DSE conditions (p=.14). Across ILI and DSE, greater weight losses were observed in participants who stopped BE at 1-year (5.3±.4 kg) and in those who reported no BE at either time point (4.8±.1 kg) than in those who continued to BE (3.1±.6 kg) and those who began BE at 1-year (3.0±.6 kg) (p=.0003). Post hoc analyses suggested these differences were due to changes in caloric intake.
Conclusions
Overweight and obese individuals with type 2 diabetes who stop binge eating appear just as successful at weight loss as non-binge eaters after one year of treatment.