Adherence
Behaviorally based weight-loss interventions result in statistically significant weight loss (average 3.0 kg or 6.6 lb greater than control) at 12 to 18 months, with greater intervention intensity (12-26 sessions) yielding greater loss (4-7 kg).
To lose weight using behavioral methods, you need to commit to a structured program with frequent contact (12-26 sessions in the first year). Expect to lose about 4-7 kg (9-15 lbs) if you attend these sessions, which is significantly more than doing nothing. Less intensive programs (<12 sessions) result in much smaller losses (1.5-4 kg).
In 21 trials that could be combined by meta-analysis, patients receiving behavioral interventions lost 3.0 kg (6.6 lb) more (95% CI, -4.0 to -2.0 kg) than controls after 12 to 18 months... Patients receiving 12 to 26 intervention sessions generally lost 4 to 7 kg (8.8 to 15.4 lb)... compared with 1.5 to 4 kg (3.3 to 8.8 lb)... in intervention groups with fewer than 12 sessions in the first year.
Why this rating
Based on 21 randomized controlled trials with high statistical heterogeneity (I2 > 95%) but consistent direction of effect.
Source
Effectiveness of Primary Care–Relevant Treatments for Obesity in Adults: A Systematic Evidence Review for the U.S. Preventive Services Task Force
Erin S. LeBlanc et al. · Annals of Internal Medicine · 2011
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