Year 2020 / Volume 27 / Number 1


Efficacy of pregabalin, gabapentin and duloxetine in neuropathic pain verified by the p-curve analysis

Rev. Soc. Esp. Dolor. 2020; 27(1): 16-23 / DOI: 10.20986/resed.2020.3727/2019

José Carlos Roche


Introduction: There is a growing concern among clinicians and researchers that many results published in scientific journals are false positives.
Objective: To determine the value of evidence or integrity of the body of the published literature on the efficacy of pregabalin, gabapentin and duloxetine in the treatment of neuropathic pain.
Methods: A literature search was conducted selecting randomized clinical trials that evaluated the efficacy of pregabalin, gabapentin and duloxetine in neuropathic pain. The p-curve analysis of the studies with statistically significant results was applied to study their distribution.
Results: It was demonstrated that there was a significant asymmetry to the right in the p-curve of the three drugs (continuous test p <0.0001) confirming the value of evidence from the studies.
Conclusions: Clinicians, scientists and scientific publications should be aware of the growing problem with "p-hacking" and its harmful effects. All parties share the responsibility to maintain the scientific integrity of the published literature.


Introducción: Existe una preocupación creciente entre los clínicos y los investigadores de que muchos resultados publicados en revistas científicas se tratan de falsos positivos.
Objetivo: Determinar el valor de evidencia o integridad del cuerpo de la literatura publicada sobre la eficacia de pregabalina, gabapentina y duloxetina en el tratamiento del dolor neuropático.
Métodos: Se realizó una búsqueda bibliográfica seleccionando ensayos clínicos aleatorizados que evaluaban la eficacia de pregabalina, gabapentina y duloxetina en dolor neuropático. Se aplicó el análisis de curva-p de los estudios con resultados estadísticamente significativos para estudiar su distribución.
Resultados: Se demostró que existía una asimetría significativa a la derecha en la curva-p de los tres fármacos (test continuo p < 0,0001) confirmando el valor de evidencia de los estudios.
Conclusiones: Los clínicos, los científicos y las publicaciones científicas deben ser conscientes del problema creciente con el “p-hacking” y sus efectos perjudiciales. Todas las partes comparten la responsabilidad en mantener la integridad científica de la literatura publicada.

Complete Article


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Instrucciones para citar

Roche J. Efficacy of pregabalin, gabapentin and duloxetine in neuropathic pain verified by the p-curve analysis. Rev Soc Esp Dolor 2020; 27(1): 16-23 / DOI: 1020986/resed20203727/2019

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Recibido: 21/02/2019

Aceptado: 05/11/2019

Prepublicado: 15/01/2020

Publicado: 19/02/2020

Tiempo de revisión del artículo: 224 días

Tiempo de prepublicación: 328 días

Tiempo de edición del artículo: 363 días


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