How soon after an epidural steroid injection can you predict the patient's response?

Background: Epidural steroid injections (ESI) are utilized for the management of radicular pain, but there are no previous published studies that detail the specific timeline of patient response to an ESI.

Purpose: To describe patients' temporal response in pain relief following an ESI.

Study Design/setting: Prospective in vivo study of consecutive patients at an outpatient physical medicine and rehabilitation clinic at a single academic spine center.