Table 1. Characteristics of the Multiple Sclerosis (MS) Cohort and Patients Hospitalized With MS Flare-Ups.
| Characteristic | MS study population, No. (%) (n = 106 523) |
|---|---|
| Sex | |
| Female | 76 471 (71.8) |
| Male | 30 052 (28.2) |
| Age at entry in MS cohort, y | |
| Mean (SD) | 43.9 (13.8) |
| Median (range) | 43.5 (0-97.8) |
| <18 | 1297 (1.2) |
| 18-34 | 28 945 (27.2) |
| 35-69 | 72 188 (67.8) |
| ≥70 | 4093 (3.8) |
| Patients with incident MS | 33 864 (31.8) |
| Duration of follow-up after entry, mean (SD), y | 8.8 (3.1) |
| Hospitalizations, per 100 person-years | 5.78 |
| Flare-ups requiring hospitalization, per 100 person-years | 3.85 |
| Use of at least 1 MS disease-modifying therapya | 74 932 (70.3) |
| Use of at least 1 high-dose corticosteroida | 50 448 (47.4) |
a
Therapy and corticosteroid listed in eTable 1 in Supplement 1.