The number of examinations categorized by T2 lesion burden and number of enhancing lesions
| T2 Lesion Burden | No. of MR Imaging Examinations | No. of MR Imaging Enhancing Lesions | At Least 1 | ||||
|---|---|---|---|---|---|---|---|
| 0 | 1 | 2 | 3 | 4 | |||
| Mild (<10 lesions) | 47/252 (19%) | 44 | 3 | 3/252 (6%) | |||
| Moderate (11–20 lesions) | 89/252 (35%) | 78 | 7 | 3 | 1 | 11/252 (12%) | |
| Severe (>20 lesions) | 116/252 (46%) | 99 | 10 | 1 | 4 | 2 | 17/252 (15%) |
| Total | 252 | 221 | 20 | 4 | 4 | 3 | 34/252 (13%) |