Table 3:

Findings at MRI in patients diagnosed with an MS exacerbation or an alternative diagnosis

	MRI Activity Only (with Enhancement or Diffusion Restriction)^{^a}	MRI Activity + Progressive WM Lesions	Progressive WM Lesions Only (without Enhancement or Diffusion Restriction)^{^b}	MRI Negative for MS Change	Total
Final clinical diagnosis of MS exacerbation (No.)	15	27	1	5	48
Other final clinical diagnoses (No.)	0	1	12	54	67

↵a The presence of a sign of active demyelination (ie, the presence of gadolinium-enhancing lesions and/or diffusion restriction).
↵b The reporting of a new or enlarging white matter lesion.