Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Functional improvement
[20] RCT	85 people with sciatica caused by herniated disc	Roland Morris Disability Questionnaire score (mean change from baseline) 35 days –5.3 with epidural corticosteroid injections (2 mL prednisolone acetate at 2-day intervals for a total of 3 injections) –3.2 with placebo (2 mL isotonic saline injection)	ARR –2.1 95% CI –5.0 to +0.8		Not significant
[19] Systematic review	228 people with unilateral sciatica, possibly caused by disc herniation Data from 1 RCT	Oswestry Disability Index 3 weeks with triamcinolone 80 mg plus 10 mL bupivacaine 0.25% with 2 mL normal saline Absolute results not reported	Reported as significant difference; see further information on studies P value not reported	Effect size not calculated	triamcinolone 80 mg plus 10 mL bupivacaine 0.25%
[19] Systematic review	228 people with unilateral sciatica, possibly caused by disc herniation Data from 1 RCT	Oswestry Disability Index 6 weeks with triamcinolone 80 mg plus 10 mL bupivacaine 0.25% with 2 mL normal saline Absolute results not reported	Reported as no significant difference; see further information on studies P value not reported		Not significant
[19] Systematic review	158 people with sciatica due to herniated nucleus pulposus Data from 1 RCT	Oswestry Disability Index 3 weeks with methylprednisolone acetate (80 mg and 8 mL of isotonic saline) with 1 mL isotonic saline Absolute results not reported	Significance not assessed
[19] Systematic review	158 people with sciatica due to herniated nucleus pulposus Data from 1 RCT	Oswestry Disability Index 3 months with methylprednisolone acetate (80 mg and 8 mL of isotonic saline) with 1 mL isotonic saline Absolute results not reported	Reported as not significant No further data reported		Not significant
[19] Systematic review	228 people with unilateral sciatica, possibly caused by disc herniation Data from 1 RCT	Oswestry Disability Index 75% improvement in scores 52 weeks 32.5% with triamcinolone 80 mg plus 10 mL bupivacaine 0.25% 29.6% with 2 mL normal saline	Significance not assessed; see further information on studies
[21] RCT	76 people with leg and back pain caused by herniated disc	Mean change in Oswestry Disability Index 3 months 13.6 with methylprednisolone 40 mg plus local anaesthetic 3.8 with local anaesthetic alone	Significance not assessed