OBJECTIVES: To determine recurrence rates of lower-extremity radicular pain after nonsurgical treatment of acute symptomatic lumbar disk herniation (LDH), and to identify predictors of recurrence. DESIGN: Prospective inception cohort. SETTING: Outpatient spine clinic. PARTICIPANTS: Patients (N=79) reporting resolution of radicular pain after magnetic resonance imaging confirmation of LDH. INTERVENTIONS: Individualized nonsurgical treatment tailored to the patient. All patients received education, but other treatments varied depending on the individual. MAIN OUTCOME MEASURES: Resolution of radicular pain was defined as a pain-free period of ≥1 month. Patients who reported resolution of radicular pain within 1 year after seeking care for acute LDH were asked whether pain had recurred at 1 year after seeking care and were also reassessed 1 year after the time of resolution of radicular pain and 2 years after seeking care. Patients reported on recurrence and the date of recurrence, if any. We evaluated the 1-year incidence of recurrence, using Kaplan-Meier survival plots. We examined predictors of recurrence using bivariate and multivariate Cox proportional hazards models. We examined the secondary outcome of back pain recurrence using identical methods. RESULTS: Twenty-five percent (95% confidence interval [CI], 15-35) of individuals with resolution of radicular pain for at least 1 month reported subsequent recurrence of pain within 1 year after resolution. The only factor independently associated with radicular pain recurrence was the number of months prior to resolution of pain (hazard ratio per month=1.24; 95% CI, 1.13-1.37; P<.001). The 1-year incidence of back pain recurrence was 43% (95% CI, 30-56), and older age decreased the hazard of recurrence. CONCLUSIONS: Recurrence of radicular pain is relatively common after nonsurgical treatment of LDH and is predicted by longer time to initial resolution of pain.
OBJECTIVES: To determine recurrence rates of lower-extremity radicular pain after nonsurgical treatment of acute symptomatic lumbar disk herniation (LDH), and to identify predictors of recurrence. DESIGN: Prospective inception cohort. SETTING:Outpatient spine clinic. PARTICIPANTS: Patients (N=79) reporting resolution of radicular pain after magnetic resonance imaging confirmation of LDH. INTERVENTIONS: Individualized nonsurgical treatment tailored to the patient. All patients received education, but other treatments varied depending on the individual. MAIN OUTCOME MEASURES: Resolution of radicular pain was defined as a pain-free period of ≥1 month. Patients who reported resolution of radicular pain within 1 year after seeking care for acute LDH were asked whether pain had recurred at 1 year after seeking care and were also reassessed 1 year after the time of resolution of radicular pain and 2 years after seeking care. Patients reported on recurrence and the date of recurrence, if any. We evaluated the 1-year incidence of recurrence, using Kaplan-Meier survival plots. We examined predictors of recurrence using bivariate and multivariate Cox proportional hazards models. We examined the secondary outcome of back pain recurrence using identical methods. RESULTS: Twenty-five percent (95% confidence interval [CI], 15-35) of individuals with resolution of radicular pain for at least 1 month reported subsequent recurrence of pain within 1 year after resolution. The only factor independently associated with radicular pain recurrence was the number of months prior to resolution of pain (hazard ratio per month=1.24; 95% CI, 1.13-1.37; P<.001). The 1-year incidence of back pain recurrence was 43% (95% CI, 30-56), and older age decreased the hazard of recurrence. CONCLUSIONS: Recurrence of radicular pain is relatively common after nonsurgical treatment of LDH and is predicted by longer time to initial resolution of pain.
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