Table 5. AVM Embolization Prognostic Score.
| AVM Embolization Prognostic Score* | No. of Patients | Any Deficit (n=29)† | Moderate or Significant Deficit (n=19)⌃ | Significant Deficit (n=10)Δ | Long-Term Moderate or Significant Deficit (n=4) |
|---|---|---|---|---|---|
| 0 | 12 | 0% | 0% | 0% | 0% |
| 1 | 52 | 6% | 6% | 6% | 2% |
| 2 | 83 | 15% | 6% | 4% | 1% |
| 3 | 47 | 21% | 15% | 4% | 4% |
| 4 | 8 | 50% | 50% | 25% | 0% |
Greater than 1 embolization treatment planned, deep venous drainage, eloquent location, and small AVM size (0-3cm) are all assigned 1 point and AVM large size is assigned 2 points
Any deficit includes transient/minimal, moderate, and significant deficits. There is a significant association between increasing AVM embolization Prognostic Score and risk of deficit after embolization (Mantel-Haenszel test for linear association, p<0.0001)
There is a significant association between increasing AVM embolization Prognostic Score and risk of moderate or significant deficit after embolization (Mantel-Haenszel test for linear association, p<0.006)
There is not a significant association between AVM embolization Prognostic Score and risk of significant deficit after embolization (Mantel-Haenszel test for linear association, p<0.095)