# Returning to Work and Cost-Effectiveness After Lumbar Facet Cryodenervation Among Patients with Chronic Low Back Pain

## TL;DR

Lumbar facet cryoablation reduces chronic low back pain and disability, with younger patients more likely to return to work, and the procedure is cost-effective.

## Contribution

This study provides new evidence on the clinical and cost-effectiveness of lumbar facet cryodenervation for chronic low back pain.

## Key findings

- Patients experienced significant reductions in pain and disability after cryoablation.
- The procedure was found to be cost-effective with a return to work rate of 58.5%.
- Younger patients (30–39 years) had the highest return to work rate at 83.3%.

## Abstract

Background/Objectives: Low back pain (LBP) is a leading cause of disability and work absenteeism worldwide. Lumbar facet joint degeneration is a common source of chronic LBP, and when conservative treatment fails, interventional procedures may be indicated. Cryodenervation is a minimally invasive option that remains less extensively studied. This study aims to evaluate clinical outcomes, cost–utility, and return-to-work rates following lumbar facet joint cryodenervation. Methods: A retrospective study included 42 professionally active patients treated with lumbar facet joint cryoablation between 2020 and 2022 at a tertiary neurosurgical center. All patients had facet-mediated LBP confirmed by a positive diagnostic medial branch block. Pain (VAS), disability (ODI), and work status were assessed before and after treatment. ODI scores were converted to SF-6D utilities to estimate quality-adjusted life years (QALYs). Cost data were obtained from institutional records. Results: Mean ODI improved from 48.5 ± 12.8 to 36.6 ± 17.8, and mean VAS from 7.0 ± 1.7 to 3.8 ± 2.0. Mean SF-6D increased from 0.53 to 0.59, corresponding to a gain of 0.0103 QALYs over four months (annualized 0.0309). The mean procedure cost was 1905 PLN, resulting in approximately 185,000 PLN per QALY, which is within the national cost-effectiveness threshold. Overall, 58.5% of patients returned to work, with the highest rate in those aged 30–39 years (83.3%). Conclusions: Lumbar facet cryoablation provides meaningful pain relief and functional improvement at a favorable cost-effectiveness profile. Younger patients show higher return-to-work rates. Larger prospective studies are required to confirm these findings.