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Comparar las tasas de respuesta de pacientes con trastorno depresivo mayor (TDM) tratados con un antagonista de los receptores de serotonina-2 (5HT2) o un inhibidor selectivo de la recaptación de serotonina (ISRS).
Métodos.
Se buscaron en Medline y PubMed todos los ensayos doble ciegos, clínicos y aleatorizados que compararon trazodona o nefazodona con un ISRS para el tratamiento del TDM. Se recogieron datos de 9 artículos con un total de 988 pacientes y se combinaron usando un modelo de efectos aleatorios.
Resultados.
Los pacientes aleatorizados para un tratamiento con un antagonista de 5HT2 tenían tantas probabilidades de conseguir una respuesta clínica como los pacientes aleatorizados al tratamiento con un ISRS (RR = 1,002, IC 95%: 0,85-1,17, P = 0,978). Las tasas de respuesta agrupadas para trazodona/nefazodona y para el ISRSS fueron 61,1% y 61,7%, respectivamente. No hubo ninguna diferencia en las tasas de suspensión total del tratamiento (P = 0,334), suspensión debida a efectos secundarios (P = 0,676) o suspensión debida a la ineficacia (P = 0,289) entre los dos grupos.
Conclusiones.
Estos resultados sugieren que los antagonistas de los receptores 5HT2 -trazodona y nefazodona- y los ISRSS no se diferencien en su eficacia y tolerabilidad total para el tratamiento del TDM. Aunque el tamaño de la muestra fue relativamente grande y tuvo poder estadístico suficiente para probar las diferencias en la muestra total, la depresión es una enfermedad heterogénea y pueden existir diferencias entre los tratamientos en los distintos subgrupos de pacientes.
To compare response rates among patients with major depressive disorder (MDD) treated with either a serotonin-2 (5HT2-) receptor antagonist or a selective serotonin reuptake inhibitor (SSRI).
Methods
Medline and PubMed were searched for double-blind, randomized clinical trials comparing either trazodone or nefazodone with an SSRI for the treatment of MDD. Data from 9 reports involving a total 988 patients were identified and combined using a random-effects model.
Results
Patients randomized to treatment with a 5HT2 antagonist were as likely to experience clinical response as patients randomized to treatment with an SSRI (RR = 1.002, 95% CI: 0.85–1.17, P = 0.978). Pooled response rates for trazodone/nefazodone and the SSRis were 61.1% and 61.7%, respectively. There was also no difference in overall discontinuation rates (P = 0.334), discontinuation due to adverse events (P = 0.676), or discontinuation due to inefficacy (P = 0.289) between the two groups.
Conclusions
These results suggest that the 5HT2-receptor antagonists trazodone and nefazodone and the SSRis do not differ with respect to their overall efficacy and tolerability in the treatment of MDD. Although the sample size was relatively large and conveyed sufficient statistical power to test for differences in the overall sample, depression is a heterogeneous condition and differences may exist between treatments in particular subgroups of patients.
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