Design and created by Guideline Central in participation with the North American Spine Society.
North American Spine Society
Publication Date: Jan 14, 2014
Page Last Updated: Jun 11, 2026
| Grade | Definition |
| Level of Evidence | |
| Level I |
|
| Level II |
|
| Level III |
|
| Level IV |
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| Level V |
|
| Grades of Recommendation | |
| A: Recommended | Good evidence (Level I studies with consistent findings) for or against recommending intervention |
| B: Suggested | Fair evidence (Level II or III studies with consistent findings) for or against recommending intervention |
| C: Optional | Poor quality evidence (Level IV or V studies) for or against recommending intervention |
| I: Insufficient | Insufficient or conflicting evidence not allowing a recommendation for or against intervention |
D011843 - Radiculopathy
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