Another trial by the same author titled: evaluation of lumbar facet joint nerve blocks in managing chronic low back pain: a randomized, double-blind, controlled trial with a 2-year follow-up, found that up to 90% of patients showed a 50% or greater decrease in pain and a 40% increase in functionality.
Igualmente, en otro estudio realizado por el mismo investigador titulado «Evaluation of lumbar facet joint nerve blocks in managing chronic low back pain: a randomized, double-blind, controlled trial with a 2-year follow-up», se encontró que hasta el 90% de los pacientes mejoraron sus síntomas de dolor un 50% o más y en funcionalidad un 40% o más.