Comparison of particulate steroid injection versus non-particulate steroid injection for lumbar radicular pain: a systematic review and meta-analysis: Running title: Steroid injection type for lower back pain

Objective: The objective of this study was to identify the difference on pain intensity and disability between particulate and non-particulate steroid injections in patients with lumbar radicular pain. Subgroup analysis by study design, type of particulate steroid, and follow-up duration were performed.