Rev. Soc. Esp. Dolor. 2022; 29(3): 175-186 / DOI: 10.1002/ejp.1975
Michele Curatolo, Sean D Rundell, Laura. S. Gold, P. Suri, Janna L Friedly, Sdrj S. Nedeljkovic, Richard A. Deyo, Judith A. Turner, Brian W. Bresnahan, Andrew L. Avins, Larry Kessler, Patrick J. Heagerty, Jeffrey G. Jarvik
ABSTRACT
Background: There is limited research on the longterm effectiveness of epidural steroid injections (ESI) in older adults despite the high prevalence of back and leg pain in this age group. We tested the hypotheses that older adults undergoing ESI, compared to patients not receiving ESI: (1) have worse pain, disability and quality of life (‘outcomes’) pre-ESI, (2) have improved outcomes after ESI and (3) have improved outcomes due to a specific ESI effect.
Methods: We prospectively studied patients ≥ 65 years old presenting to primary care with new episodes of back pain in three US healthcare systems (BOLD reg- istry). Outcomes were leg and back pain intensity, disability and quality of life, assessed at baseline and 3-, 6-, 12- and 24-month follow-ups. We categorized participants as: (1) ESI within 6 months from the index visit (n = 295); (2) no ESI within 6 months (n = 4809); (3) no ESI within 6 months, propensity-score matched to group 1 (n = 483). We analysed the data using linear regression and Generalized Estimating Equations.
Results: Pain intensity, disability and quality of life at baseline were significantly worse at baseline in ESI patients (group 1) than in group 2. The improvement from baseline to 24 months in all outcomes was statistically significant for group 1. However, no statistically significant differences were observed between out- come trajectories for the propensity-score matched groups 1 and 3.
Conclusions: Older adults treated with ESI have longterm improvement. However, the improvement is unlikely the result of a specific ESI effect.
Significance: In this large, two-year, prospective study in older adults with a new episode of low back pain, back pain, leg pain, disability and quality of life improved after epidural steroid injections; however, propensity-score matching revealed that the improvement was unlikely the result of a specific effect of the injections, indicating that epidural steroids are unlikely to provide long-term benefits in older adults with new episodes of back and leg pain.
RESUMEN
Antecedentes: Hay pocos estudios sobre la eficacia a largo plazo de las inyecciones epidurales de esteroides (IEE) en las personas mayores a pesar de la elevada prevalencia del dolor de espalda y de miembros inferiores en este grupo de edad. Probamos las hipótesis de que los adultos mayores que reciben IEE, frente a los que no: (1) tienen más dolor y discapacidad y peor calidad de vida (‘resultados’) antes de las IEE, (2) presentan mejores resultados después de las IEE y (3) tienen resultados mejores debido a un efecto específico de las IEE.
Métodos: Estudiamos prospectivamente a pacientes de ≥ 65 años de edad que acudieron a la atención primaria con nuevos episodios de dolor de espalda en tres sistemas sanitarios estadounidenses (registro BOLD). Los resultados a evaluar fueron la intensidad del dolor de miembros inferiores y de espalda, la discapacidad y la calidad de vida, valorados en el momento basal y a los 3, 6, 12 y 24 meses de seguimiento. Clasificamos a los participantes en: (1) IEE en los 6 meses siguientes a la visita inicial (n = 295); (2) sin IEE en el plazo de 6 meses (n = 4809); (3) sin IEE en el plazo de 6 meses, puntuación de propensión equiparada a la del grupo 1 (n = 483). Analizamos los datos mediante regresión lineal y ecuaciones de estimación generalizadas.
Resultados: La intensidad del dolor, la discapacidad y la calidad de vida basales fueron significativamente peores en los pacientes con IEE (grupo 1) que en los del grupo 2. La mejoría de todos los resultados evaluables desde el momento basal hasta los 24 meses fue estadísticamente significativa para el grupo 1. Sin embargo, no se observaron diferencias estadísticamente significativas entre las evoluciones de los resultados en los grupos con puntuaciones de propensión equiparadas, 1 y 3.
Conclusiones: Los adultos mayores tratados con IEE presentan mejorías a largo plazo. Sin embargo, es improbable que dicha mejoría se deba a un efecto específico de la IEE.
Significancia: En este gran estudio prospectivo de dos años de adultos mayores con un nuevo episodio de dolor lumbar, el dolor de espalda, el dolor de miembros inferiores, la discapacidad y la calidad de vida mejoraron después de las inyecciones epidurales de esteroides; sin embargo, la equiparación de las puntuaciones de propensión mostró que la mejoría era improbable que se debiera a un efecto específico de las inyecciones, indicando que es poco probable que los esteroides epidurales aporten beneficios a largo plazo a los adultos mayores con nuevos episodios de dolor de espalda y miembros inferiores.
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