This study aims to investigate the effect of different doses of dexamethasone used in epidural nerve block procedures on blood sugar levels. Patients with spinal conditions such as stenosis or disc herniation will be enrolled. Blood glucose and HbA1c levels will be measured before the procedure, and participants will use continuous glucose monitoring devices for 2-3 days before the procedure. They will be randomly assigned to one of three groups: no dexamethasone, 5mg dexamethasone, or 7.5mg dexamethasone. Blood glucose will be monitored for one week after the procedure, and follow-up will be done two weeks later to assess pain and blood sugar data. This study will help determine how steroid doses affect blood sugar, especially in elderly patients, and provide more accurate information than previous studies.

Inclusion Criteria:

• patients need to epidural steroid injection for treating back pain
• patients diagnosed with diabetes or prediabetes.

Exclusion Criteria:

• Patients with poorly controlled blood sugar.(HbA1c>8.5)

Format of data(anonymized datasets).

Start date: The date when the individual participant data (IPD) and supporting information will first be made available.( starting the study)

End date: The date when access to the IPD and supporting information will no longer be available or when the sharing period ends. (for 3yrs)