Table 1.
Demographic characteristics.
| Total, n = 80 | |
|---|---|
| Age, mean (SD) | 40.6 (10.1) |
| Gender, female, n (%) | 55 (68.6) |
| Number of NTZ infusions, mean (SD)a | 64.7 (32.2) |
| JCV positive, n (%) | 29 (36.3) |
| EDSS at baseline NTZ, median (IQR) | 3.3 (2.5) |
| ARR before NTZ start, mean (SD) | 1.4 (0.9) |
| Number of gadolinium enhancing lesions at baseline, median (IQR) | 1.5 (4) |
SD: standard deviation; NTZ: natalizumab; EDSS: Expanded Disability Status Scale; IQR: interquartile range; ARR: annual relapse rate; JCV: John Cunningham virus.
a
Number of NTZ infusions at the time of the first measured concentration.