Neuroimaging outcomes
n=2/8
Nineteen acute neuroimaging scans were available for 13 participants (72%; IVIG n=8/10 (80%), placebo n=5/8 (63%)). Five of these scans (for five unique participants; IVIG n=2/8 (25%), placebo n=3/8 (38%)) had abnormal findings; all of these were MRI scans (see There were nine follow-up scans for eight unique participants (IVIG n=5/10 (50%), placebo n=3/8 (50%)); six of these scans (for five unique participants; IVIG n=3/5 (60%), placebo n=1/4 (25%)) were normal and unchanged from the acute scan. Three follow-up scans (for three unique participants; IVIG n=2/5 (40%), placebo n=1/3 (33%)) had abnormal findings; two of these were unchanged from the acute scans and an acute scan was not available for comparison one participant.