Table 7.

Strength of evidence

Intervention	Strength of evidence
1. Intrathecal methylprednisolone	Very low
2. Intercostal nerve chemical neurolysis	Low
3. Epidural steroid injection	Low
4. Pulsed RFA for intercostal nerve and dorsal root ganglion	Moderate
5. Paravertebral steroid injection and chemical neurolysis	Low
6. Stellate ganglion blocks and RFA	Moderate
7. Spinal cord stimulation	Low

Definitions of grades of evidence:

High = further research is unlikely to change our confidence in the estimate of effect, moderate = further research is likely to have an important impact on our confidence in the estimate of effect and may change the estimate, low = further research is very likely to have an important impact on our confidence in the estimate of effect and is likely to change the estimate, very low = any estimate of effect is very uncertain