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Duration of natalizumab exposure
| Total (months) | |
|---|---|
| Mean ± SD | 6.6 ± 5.5 |
| Median [min, max] | 9.5 [0.0, 16.7] |
| < 6 months, n (%) | 49 (46.2) |
| ≥ 6 and < 12 months, n (%) | 41 (38.7) |
| ≥ 12 and < 18 months, n (%) | 16 (15.1) |
| ≥ 18 and < 24 months, n (%) | 0 (0.0) |
| ≥ 24 months, n (%) | 0 (0.0) |
SD standard deviation
