Racial and Socioeconomic Disparities in Spinal Cord Stimulation Among the Medicare Population

Spinal cord stimulation (SCS) is used in the treatment of many chronic pain conditions. This study investigates racial and socioeconomic disparities in SCS among Medicare patients with chronic pain.

Patients over the age of 18 with a primary diagnosis of postlaminectomy syndrome (ICD-10 M96.1) or chronic pain syndrome (ICD-10 G89.4) were identified in the Center for Medicare and Medicaid Services (CMS) Medicare Claims Limited Data Set. We defined our outcome as SCS therapy by race and socioeconomic status. Multivariable logistic regression was used to determine the variables associated with SCS.

We identified 1,244,927 patients treated between 2016 and 2019 with a primary diagnosis of postlaminectomy syndrome (PLS) or chronic pain syndrome (CPS). Of these patients, 59,182 (4.8%) received SCS. Multivariable logistic regression analysis revealed that, compared with White patients, Black (OR [95%CI], 0.62 [0.6-0.65], p < 0.001), Asian (0.66 [0.56-0.76], p < 0.001), Hispanic (0.86 [0.8-0.93], p < 0.001), and North American Native (0.62 [0.56-0.69], p < 0.001) patients were significantly less likely to receive SCS. In addition, patients who were dual-eligible for Medicare and Medicaid were significantly less likely to receive SCS than those eligible for Medicare only (OR = 0.38 [95% CI: 0.37-0.39], p < 0.001).

This study suggests that racial and socioeconomic disparities exist in SCS among Medicare and Medicaid patients with PLS and CPS. Further work is required to elucidate the complex etiology underlying these findings.