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      Análisis coste-efectividad del uso de atorvastatina en pacientes diabéticos de tipo 2: modelo farmacoeconómico del estudio CARDS Translated title: Cost-effectiveness analysis of the use of atorvastatin in patients with type 2 diabetes mellitus: a pharmacoeconomic model of the CARDS study

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          Abstract

          Fundamento y objetivo: Efectuar un análisis coste-efectividad del uso de Atorvastatina 10 mg en la prevención primaria de la enfermedad cardiovascular en el paciente con Diabetes Mellitus tipo 2 (DM2). Método: Se elaboró un modelo retrospectivo y determinístico basado en un análisis de decisión a partir del estudio CARDS (Collaborative Atorvastatin Diabetes Study). En el estudio CARDS se había demostrado que Atorvastatina 10 mg versus placebo en prevención primaria en pacientes con DM2 y alguna patología asociada, reduce la morbimortalidad cardiovascular (5,8 vs. 9,0%, p = 0,001). En el presente análisis coste-efectividad, las unidades de efectividad utilizadas fueron años de vida ganados (AVG) y años de vida ajustados por calidad (AVAC), obtenidos a partir de las diferencias de morbimortalidad y de la esperanza de vida de los diabéticos, con y sin eventos previos, obtenidos de la literatura. El consumo de recursos de las alternativas en evaluación se ha extraído del estudio CARDS aplicando costes españoles. Resultados: El cociente coste-efectividad incremental derivado de utilizar Atorvastatina 10 mg versus placebo fue 5.886 € por AVG y de 8.046 € por AVAC. Los análisis de sensibilidad confirmaron la estabilidad del modelo. Conclusiones: En la prevención primaria del riesgo cardiovascular en pacientes diabéticos tipo 2, el uso de Atorvastatina 10 mg es coste-efectivo, con un coste por AVG y por AVAC por debajo de otras alternativas empleadas ampliamente en el Sistema Nacional de Salud español, y también por debajo de un valor que podría considerarse como un umbral razonable para nuestro país, situado oficiosamente en torno a los 30.000 € por AVAC.

          Translated abstract

          Background and objective: To perform a cost-effectiveness analysis of the use of Atorvastatin 10 mg in the primary prevention of cardiovascular disease in patients with type 2 diabetes (DM2). Method: A deterministic and retrospective model by a decision analysis based on CARDS study (Collaborative Atorvastatin Diabetes Study) was performed. In the CARDS study, a significant reduction in cardiovascular morbimortality by the use of Atorvastatin 10 mg versus placebo (5.8 vs. 9.0%, p=0.001) in DM2 patients with an additional condition, had previously been demonstrated. In the present cost-effectiveness analysis, effectiveness units were life years gained (LYG) and quality adjusted life years (QALY), obtained from differences in morbimortality and life expectancy in DM2 patients, with and without previous cardiovascular events. Costs of the evaluated alternatives were obtained from the CARDS results. Results: Incremental cost-effectiveness ratio of using Atorvastin 10 mg versus placebo was 5,886 € per LYG and 8,046 € per QALY. Sensitivity analyses confirmed the model stability. Conclusions: In the primary prevention of the cardiovascular disease in type 2 diabetic patients, the use of Atorvastatin 10 mg is cost-effective, with a cost per LYG and per QALY below that of other alternatives widely used in the Spanish National Health System, and also below a value considered as a reasonable threshold for our country, which might unofficialy be around 30,000 €/ QALY.

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          MRC/BHF Heart Protection Study of cholesterol-lowering with simvastatin in 5963 people with diabetes: a randomised placebo-controlled trial.

          Individuals with diabetes are at increased risk of cardiovascular morbidity and mortality, although typically their plasma concentrations of LDL cholesterol are similar to those in the general population. Previous evidence about the effects of lowering cholesterol in people with diabetes has been limited, and most diabetic patients do not currently receive cholesterol-lowering therapy despite their increased risk. 5963 UK adults (aged 40-80 years) known to have diabetes, and an additional 14573 with occlusive arterial disease (but no diagnosed diabetes), were randomly allocated to receive 40 mg simvastatin daily or matching placebo. Prespecified analyses in these prior disease subcategories, and other relevant subcategories, were of first major coronary event (ie, non-fatal myocardial infarction or coronary death) and of first major vascular event (ie, major coronary event, stroke or revascularisation). Analyses were also conducted of subsequent vascular events during the scheduled treatment period. Comparisons are of all simvastatin-allocated versus all placebo-allocated participants (ie, intention to treat), which yielded an average difference in LDL cholesterol of 1.0 mmol/L (39 mg/dL) during the 5-year treatment period. Both among the participants who presented with diabetes and among those who did not, there were highly significant reductions of about a quarter in the first event rate for major coronary events, for strokes, and for revascularisations. For the first occurrence of any of these major vascular events among participants with diabetes, there was a definite 22% (95% CI 13-30) reduction in the event rate (601 [20.2%] simvastatin-allocated vs 748 [25.1%] placebo-allocated, p<0.0001), which was similar to that among the other high-risk individuals studied. There were also highly significant reductions of 33% (95% CI 17-46, p=0.0003) among the 2912 diabetic participants who did not have any diagnosed occlusive arterial disease at entry, and of 27% (95% CI 13-40, p=0.0007) among the 2426 diabetic participants whose pretreatment LDL cholesterol concentration was below 3.0 mmol/L (116 mg/dL). The proportional reduction in risk was also about a quarter among various other subcategories of diabetic patient studied, including: those with different duration, type, or control of diabetes; those aged over 65 years at entry or with hypertension; and those with total cholesterol below 5.0 mmol/L (193 mg/dL). In addition, among participants who had a first major vascular event following randomisation, allocation to simvastatin reduced the rate of subsequent events during the scheduled treatment period. The present study provides direct evidence that cholesterol-lowering therapy is beneficial for people with diabetes even if they do not already have manifest coronary disease or high cholesterol concentrations. Allocation to 40 mg simvastatin daily reduced the rate of first major vascular events by about a quarter in a wide range of diabetic patients studied. After making allowance for non-compliance, actual use of this statin regimen would probably reduce these rates by about a third. For example, among the type of diabetic patient studied without occlusive arterial disease, 5 years of treatment would be expected to prevent about 45 people per 1000 from having at least one major vascular event (and, among these 45 people, to prevent about 70 first or subsequent events during this treatment period). Statin therapy should now be considered routinely for all diabetic patients at sufficiently high risk of major vascular events, irrespective of their initial cholesterol concentrations.
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            How attractive does a new technology have to be to warrant adoption and utilization? Tentative guidelines for using clinical and economic evaluations.

            Because economic evaluations of health care services are being published with increasing frequency it is important to (a) evaluate them rigorously and (b) compare the net benefit of the application of one technology with that of others. Four "levels of evidence" that rate economic evaluations on the basis of their methodologic rigour are proposed. They are based on the quality of the methods used to estimate clinical effectiveness, quality of life and costs. With the use of the magnitude of the incremental net benefit of a technology, therapies can also be classified into five "grades of recommendation." A grade A technology is both more effective and cheaper than the existing one, whereas a grade E technology is less or equally effective and more costly. Those of grades B through D are more effective and more costly. A grade B technology costs less than $20,000 per quality-adjusted life-year (QALY), a grade C one $20,000 to $100,000/QALY and a grade D one more than $100,000/QALY. Many issues other than cost effectiveness, such as ethical and political considerations, affect the implementation of a new technology. However, it is hoped that these guidelines will provide a framework with which to interpret economic evaluations and to identify additional information that will be useful in making sound decisions on the adoption and utilization of health care services.
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              Assessing the impact of complications on the costs of Type II diabetes.

              'The Cost of Diabetes in Europe - Type II (CODE-2) study' provides the first coordinated attempt to assess the total costs of managing people with Type II (non-insulin-dependent) diabetes mellitus in Europe. Type II diabetes is associated with a number of serious long-term complications, which are a major cause of morbidity, hospitalisation and mortality in diabetic patients. Patients were divided into four broad categories defining their complication status in terms of no complications, one or more microvascular complications, one or more macrovascular complications or one or more of each microvascular and macrovascular complication. The prevalence of complications and associated costs were assessed retrospectively for 6 months. In total, 72% of patients in the CODE-2 study had at least one complication, with 19% having microvascular only, 10% having macrovascular only and 24% of the total having both microvascular and macrovascular complications. Of patients with microvascular complications, 28% had neuropathy, 20% renal damage, 20% retinopathy and 6.5% required treatment for eye complications. Among the patients with macrovascular complications, 18% had peripheral vascular disease, 17% angina, 12% heart failure and 9% had myocardial infarction. Percutaneous transluminal coronary angioplasty, coronary artery bypass graft or stroke occurred in 3%, 4% and 5% of the patients, respectively. In patients with both microvascular and macrovascular complications, the total cost of management was increased by up to 250% compared to those without complications. Complications have a substantial impact on the costs of managing Type II diabetes. This study has confirmed that the prevention of diabetic complications will not only benefit patients, but potentially reduce overall healthcare expenditure.
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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                ami
                Anales de Medicina Interna
                An. Med. Interna (Madrid)
                Arán Ediciones, S. L. (, , Spain )
                0212-7199
                May 2006
                : 23
                : 5
                : 213-219
                Affiliations
                [03] Pontevedra orgnameHospital de Montecelo orgdiv1Servicio de Endocrinología
                [01] Madrid orgnamePfizer I+D+i orgdiv1Unidad Médica orgdiv2Departamento de Investigación de Resultados en Salud y Farmacoeconomía
                [02] Madrid orgnameHospital Gregorio Marañón orgdiv1Unidad Coronaria
                [04] Madrid orgnameHospital Clínico San Carlos orgdiv1Servicio de Hemodinámica
                [05] Madrid orgnameHERO Consulting
                Article
                S0212-71992006000500003
                10.4321/s0212-71992006000500003
                3509672f-513a-4390-b290-e0c414e75b7f

                This work is licensed under a Creative Commons Attribution-NonCommercial 3.0 International License.

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                Figures: 0, Tables: 0, Equations: 0, References: 28, Pages: 7
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                SciELO Spain


                Diabetes mellitus,Prevención primaria,Coste efectividad,Atorvastatina,Primary prevention,Cost effectiveness,Atorvastatin

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