MG-ADL is an 8-item, participant-reported questionnaire that assesses gMG symptoms and their effects on activities of daily living. Each item is assessed on a 4-point scale where a score of 0 represents normal function and a score of 3 represents loss of ability to perform that function. Total score ranges from 0 to 24, with higher scores indicating greater functional impairment and disability.

Relapse is defined as a worsening (increase) of \>=1 point on adjusted inflammatory neuropathy cause and treatment (AdjINCAT) score at any time point during Period 2 relative to Period 2 Baseline which is sustained at a Follow-Up visit 1 week later. The INCAT disability scale is a widely used and validated efficacy assessment of neurologic dysfunction in CIDP. Upper and lower limb dysfunction are each separately assessed on a scale of 0-5 and results are summed together for a total composite score of 0-10. Higher scores represent greater disability. The Adj INCAT disability score is identical to INCAT disability score with exception that changes in upper limb function from 0 (normal) to 1 (minor symptoms) and vice versa are excluded since minor symptoms in the fingers, which are implied by an upper limb score of 1, are not considered clinically significant in all participants. The Adj INCAT disability score will be used for participant selection and measurement of clinical response.