Levels of support and nature of evidence used in voting on statements at the Genval Workshop
| Category | Level of support |
|---|---|
| A | Accept completely |
| B | Accept with some reservation |
| C | Accept with major reservation |
| D | Reject with reservation |
| E | Reject completely |
| Category | Nature of the evidence |
| A | Well designed and appropriately controlled trials |
| B | Well designed cohort or case controlled studies |
| C | Case reports or flawed clinical trials |
| D | My own clinical experience |
| E | There is not sufficient evidence available to form an opinion |