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Bariatric treatments for adult obesity - Institute of Health Economics

Bariatric treatments for adult obesity - Institute of Health Economics

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Currency/priceyearResult<strong>Health</strong> outcomes€/2003Clinical evidence was derived from five RCTs that included 1386 patients.Compared with diet alone, the QALY gain was 0.028 in orlistat patients and 0.09 inorlistat responders.Costs The incremental cost associated with orlistat versus diet alone was €478.Marginal analysisConclusionThe ICER <strong>for</strong> orlistat versus diet was €16,954 per QALY gained.Orlistat is effective and cost-effective in obese patients if, after 3 months <strong>of</strong> treatment,only treatment responders continue treatment.9 Study 16 Authors/publish year: Iannazzo/2008; country: Italy; study type: CUA; setting: primarycare; study perspective: societyObjectiveTo assess the cost-effectiveness <strong>of</strong> orlistat in combination with lifestyle modification <strong>for</strong>the treatment <strong>of</strong> <strong>obesity</strong>.Population Individuals aged ≥ 35 years with a BMI ≥ 30 kg/m 2InterventionOrlistat in combination with lifestyle modification was compared with lifestylemodification alone. The lifestyle modification included a reduced-calorie diet and exercise.Time Horizon/discount rateCurrency/priceyear10 years/3.5%€/NAResult<strong>Health</strong> outcomesCostsA Markov model that incorporated impact <strong>of</strong> <strong>obesity</strong> and diabetes on cardiovascularmortality was constructed to simulate the clinical and economic outcomes <strong>of</strong> theinterventions.Compared to placebo, orlistat led to a QALY gain <strong>of</strong> 0.046 (6.084 versus 6.13) and a LYgain <strong>of</strong> 0.014 (8.011 versus 8.026).The extra cost-per-patient in orlistat over placebo group was €2948 (€12,580 versus€15,530).Marginal analysis The incremental cost per QALY gained with orlistat over placebo was €75,310.ConclusionAdding orlistat to lifestyle modification provided the best value-<strong>for</strong>-money in the subgroup<strong>of</strong> obese patients with IGT.10 Study 17 Authors/publish year: Hampp/2008; country: US; study type: RCT/CUA; setting:primary care; study perspective: payerObjectivePopulationInterventionTo assess the clinical and economic impact <strong>of</strong> rimonabant in combination with lifestylemodification <strong>for</strong> the treatment <strong>of</strong> <strong>obesity</strong>.Individuals aged ≥ 18 years with a BMI ≥ 30 kg/ m 2 or a BMI ≥ 27 kg/m 2 with treatedor untreated dyslipidaemia or hypertension.Five alternatives were examined: rimonabant at a daily dose <strong>of</strong> 20 mg plus lifestyleinterventions <strong>for</strong> one year; rimonabant plus lifestyle interventions <strong>for</strong> 1 year followed byplacebo plus lifestyle interventions <strong>for</strong> 1 year; rimonabant plus lifestyle intervention <strong>for</strong> 2years; placebo plus lifestyle interventions <strong>for</strong> 2 years; and no intervention. The lifestyleintervention was low-calorie diet and exercise.<strong>Bariatric</strong> <strong>treatments</strong> <strong>for</strong> <strong>adult</strong> <strong>obesity</strong> 191

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