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Vol. 6. Issue 4.
Pages 187-195 (July - August 2010)
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Vol. 6. Issue 4.
Pages 187-195 (July - August 2010)
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An economic evaluation of chondroitin sulfate and non-steroidal anti-inflammatory drugs for the treatment of osteoarthritis. Data from the VECTRA study
Evaluación económica del uso de condroitín sulfato y antiinflamatorios no esteroideos en el tratamiento de la artrosis. Datos del estudio VECTRA
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Carlos Rubio-Terrés, Grupo del estudio VECTRA
Health Value, Health Economics and Research Outcomes Consulting, Madrid, Spain
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Abstract
Objective

Our aim was to investigate: 1) the average cost per patient with osteoarthritis treated with chondroitin sulfate compared with NSAIDs for 6 months and 2) the possible impact that the reduction NSAID use due to monotherapy with or combined administration of chondroitin sulfate treatment may have on the budget of the Spanish National Health System.

Methods

A cost-minimization model compared both treatments (efficacy equivalence assumption), used at the recommended doses and regimens during a 6-month period. Data used in the model was obtained from the VECTRA study, a retrospective study of 530 patients with osteoarthritis treated with chondroitin sulfate or NSAIDs that was conducted to determine the consumption of health care resources. The efficacy and incidence of adverse events was estimated from meta-analysis based on randomized clinical trials. Univariate sensitivity analysis was performed for the base case scenario.

Results

The overall 6-month cost per patient given chondroitin sulfate was 141 € compared with 182 € when treated with NSAIDs. If during the forthcoming 3 years, 5%, 10%, and 15% of patients currently treated with NSAIDs would gradually be replaced by treatment with chondroitin sulfate, the expected savings for the Spanish National Health System during these 3 years would be over 38,700,000 €. In addition, 2,666 cases of gastrointestinal adverse events (including 90 serious adverse events) will have been avoided for every 10,000 patients treated with chondroitin sulfate instead of NSAID. Sensitivity analysis confirmed the strength of base-case in all scenarios.

Conclusions

On the basis of these findings, chondroitin sulfate is a treatment for osteoarthritis with a lesser cost and better gastrointestinal tolerability compared with NSAIDs.

Keywords:
Chondroitin sulphate
Non-steroidal antiinflammatory drugs
Antirheumatic drugs
Osteoarthritis
Knee osteoarthritis
Hip osteoarthritis
Costs
Resumen
Objetivo

El presente estudio a) estima el coste medio de un paciente con artrosis tratado durante 6 meses con condroitín sulfato (CS) o antiinflamatorios no esteroideos (AINE), y b) evalúa el impacto presupuestario para el Sistema Nacional de Salud que causaría la disminución del consumo de AINE con la administración en monoterapia o conjunta de CS.

Material y método

Modelo de minimización de costes que comparó ambos tratamientos (asumiendo igualdad de eficacia), a las dosis y las pautas recomendadas, durante un período de seis meses. Los datos utilizados en el modelo se obtuvieron del estudio VECTRA, un estudio retrospectivo en el que se recogió el consumo de recursos sanitarios de 530 pacientes con artrosis tratados con CS o AINE. La eficacia y la incidencia de efectos adversos se estimaron a partir del metaanálisis de ensayos clínicos aleatorizados. Se hicieron análisis de sensibilidad simples univariantes del caso básico.

Resultados

El coste semestral por paciente tratado con CS fue de 141 €, y de 182 € en el caso de los AINE. Esto significa que, si durante los 3 próximos años el 5, el 10 y el 15% de los pacientes con artrosis tratados actualmente con AINE fueran tratados con CS, se generarían ahorros para el Sistema Nacional de Salud de más de 38,7 millones de euros durante este período. Además, por cada 10.000 pacientes tratados con CS en lugar de AINE se evitarían 2.666 efectos adversos gastrointestinales, de los que 90 serían graves. Los análisis de sensibilidad confirmaron la estabilidad del caso básico en todos los supuestos considerados.

Conclusiones

Comparado con los AINE, el CS es un tratamiento con menores costes y con mejor tolerancia gastrointestinal en el manejo de la artrosis.

Palabras clave:
Condroitín sulfato
Agentes antiinflamatorios no esteroideos
Agentes antirreumáticos
Artrosis
Artrosis de rodilla
Artrosis de cadera
Costes
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The list of the VECTRA study researchers is shown in Annex I.

VECTRA is the acronym for the “Economic and Health Evaluation of Chondroitin Sulphate for the Treatment of Osteoarthritis”.

Copyright © 2010. Sociedad Española de Reumatología and Colegio Mexicano de Reumatología
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