Ekedahl H, et al. – Subgroup differences in 1–yr response to transforaminal epidural steroid injection were assessed in patients with chronic radicular pain. Clinical findings failed to predict the 1–yr treatment response in patients treated with 1 or several transforaminal epidural steroid injections due to chronic lumbar radicular pain. Factors predicted a favorable 1–yr response to transforaminal epidural steroid injection were low age, short duration of leg pain, central/subarticular disc herniation, and high–grade subarticular nerve compression.