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. 2012 May;6(2 Suppl):5–98. doi: 10.1177/2049463712444183
Type of study: Retrospective case notes data analysis
Sample: Patients with chronic low back pain
Setting: Pain clinic in a district general hospital
Study period: April 2010 to April 2011
Outcome measures: Pain relief of 50% or greater, duration of pain relief 6 weeks post injection
Inclusion criteria: Patients with SIJ injection only
Exclusion Criteria: Patients who received SIJ injections plus other interventional procedures simultaneously.