Research Summary

Reoperation Risk After Single-Level Lumbar Discectomy

Anthony Calabro, MA

Key Highlights

  • The 5-year subsequent lumbar surgery rate was 14.4% after single-level lumbar discectomy.
  • Patients undergoing revision discectomy had a 5-year reoperation rate of 18.2% and a lumbar fusion rate of 12.4%.
  • Obesity and higher comorbidity burden were significant predictors of reoperation.
  • Risk of reoperation was greatest in the first year following both index and revision procedures.

In a large-scale retrospective cohort study, investigators found that nearly 15% of patients required additional lumbar surgery within 5 years of an initial single-level discectomy. Patients undergoing revision discectomy demonstrated even higher reoperation and fusion rates, the study found.

The percentages associated with reoperation rates after lumbar discectomy are widespread, with reported ranges spanning from 5% to 24%. A clearer understanding of these rates could help set appropriate expectations for patients and support follow-up planning.

To address this, researchers performed a retrospective analysis using the PearlDiver database. Patients 18 years or older with a minimum of 5 years of follow-up after a single-level lumbar discectomy were included. The primary outcome was the 5-year rate of subsequent lumbar surgery. Secondary analyses assessed outcomes after revision discectomy, fusion rates following primary or revision procedures, and patient-level risk factors for reoperation. Statistical analyses included Kaplan-Meier survival methods and Cox proportional hazards modeling.

Among 308,979 patients, the 5-year rate of subsequent lumbar surgery after index discectomy was 14.4%, with a lumbar fusion rate of 6.1%. Of the 67,098 patients who underwent revision discectomy, the subsequent lumbar surgery rate rose to 18.2%, and the lumbar fusion rate nearly doubled to 12.4%.

Kaplan-Meier curves revealed that the risk of further surgery accumulated most rapidly within the first postoperative year following both index and revision procedures. Regression analyses identified obesity (hazard ratio [HR], 1.12; 95% CI, 1.097-1.141) and higher Elixhauser Comorbidity Index scores (HR, 1.06; 95% CI, 1.060-1.068) as independent predictors of additional lumbar surgery after index discectomy.

“This is the largest cohort to date studying reoperation rates after single-level lumbar discectomy,” the authors concluded. “Patients should be counseled regarding the significant risk of subsequent surgeries, particularly after revision discectomy. Fusion procedures were more frequently performed after revision discectomy, underscoring the need to carefully consider surgical planning and patient selection in recurrent lumbar disc herniation cases.”

Reference

Etigunta SK, Liu AM, Gausper A, et al. Long-term reoperation rates after single-level lumbar discectomy: a nationwide cohort study. Spine (Phila Pa 1976). 2025;50(15):1052-1057. doi:10.1097/BRS.0000000000005328