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  • Title: Cost-effectiveness of a family-based GP-mediated intervention targeting overweight and moderately obese children.
    Author: Moodie M, Haby M, Wake M, Gold L, Carter R.
    Journal: Econ Hum Biol; 2008 Dec; 6(3):363-76. PubMed ID: 18657487.
    Abstract:
    OBJECTIVE: To assess from a societal perspective the incremental cost-effectiveness of a family-based GP-mediated intervention targeting overweight and moderately obese children. The intervention was modelled on the LEAP (live, eat and play) trial, a randomised controlled trial conducted by the Centre for Community Child Health, Melbourne, Australia in 2002-2003. This study was undertaken as part of the assessing cost-effectiveness (ACE) in obesity project which evaluated, using consistent methods, 13 interventions targeting unhealthy weight gain in children and adolescents. METHOD: A logic pathway was used to model the effects of the intervention compared to no intervention on body mass index (BMI) and health outcomes (disability-adjusted life years-DALYs). Disease costs and health benefits were tracked until the cohort of eligible children reached the age of 100 years or death. Simulation-modelling techniques were used to present a 95% uncertainty interval around the cost-effectiveness ratio. The intervention was also assessed against a series of filters ('equity', 'strength of evidence', 'acceptability', 'feasibility', sustainability' and 'side-effects') to incorporate additional factors that impact on resource allocation decisions. RESULTS: The intervention, as modelled, reached 9685 children aged 5-9 years with a BMI z-score of >or=3.0, and cost $AUD6.3M (or $AUD4.8M excluding time costs). It resulted in an incremental saving of 2300 BMI units which translated to 511 DALYs. The cost-offsets stemming from the intervention totalled $AUD3.6M, resulting in a net cost per DALY saved of $AUD4670 (dominated; $0.1M) (dominated means intervention costs more for less effect). CONCLUSION: Compared to a 'no intervention' control group, the intervention was cost-effective under current assumptions, although the uncertainty intervals were wide. A key question related to the long-term sustainability of the small incremental weight loss reported, based on the 9-month follow-up results for LEAP.
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