Response to IVIg treatment in patients with multifocal motor neuropathy in relation to the presence and degree of motor CB
| Patients with definite or probable CB (AAEM criteria) | Patients with possible CB | Patients without overt CB | |
|---|---|---|---|
| Number of patients treated | 14 | 6 | 3 |
| Number that consistently improved | 12 (86%) | 4 (67%) | 1 (33%) |
| In Rankin score | 11 | 3 | 0 |
| Mean Rankin scores before → after IVIg | 2.2→1.2 | 2.2→1.7 | 2.7→2.7 |
| In UL impairment score | 12 | 3 | 0 |
| Mean score before → after IVIg | 2.4→1.4 | 2.3→1.7 | 2.7→2.7 |
| In LL impairment score | 6 | 3 | – |
| Mean score before → after IVIg | 1.3→0.6 | 1.8→1.2 | 0→0 |
| By 20% in UL or LL MRC score | 5 | 1 | 1 |
| Mean UL MRC score before → after IVIg | 75.8→87.3 | 79.5→88.5 | 57.3→63 |
| Mean LL MRC score before → after IVIg | 88.3→95.5 | 83.3→89.3 | 96.3→98.7 |
| Number that marginally improved >10% in UL or LL MRC score | 1 (7%) | 1 (17%) | 0 |