Total clinical activity index (the index for the individual patient is the numerical sum of clinical features)
| Eye | |
|---|---|
| 0 normal | |
| 1 cells in vitreous and/or anterior chamber only | |
| 2 vision 50% | |
| 3 vision 30% | |
| 4 able to see few feet | |
| 5 blind | |
| Skin | |
| 1 aphthae | |
| 1 erythema nodosum | |
| 1 genital ulceration | |
| Vascular involvement | |
| 1 unilateral calf vein thrombosis (cvt) and/or superficial thrombophlebitis (tb) | |
| 2 bilateral cvt and/or tb | |
| 3 cvt and/or tb requiring bed rest | |
| 4 thrombosis of vena cava superior (vcs) or vena cava inferior (vci) | |
| 5 thrombosis of vcs and vci and/or arterial occlusion | |
| Arthritis | |
| 1 for each joint | |
| Neurological involvement | |
| 2 intracranial hypertension | |
| 4 multiple sclerosis like syndrome | |
| 5 pyramidal and/or cerebellar involvement |