Characteristics of the subgroup of patients with disease onset before the age of 30
| N (%) | Relapse onset | Age at onset of MS | Age at first child | No of children | EDSS 6 reached | Time to EDSS 6 | |
| n (%) | Mean (SD; min to max) | Mean (SD; min to max) | Mean (range) | n (%) | Median (IQR) | ||
| (1) No children | 48 (32) | 47 (98) | 22.0 (4.6; 13 to 29) | – | – | 25 (52) | 8 (5.0 to 15.5) |
| (2) Children only before onset of MS | 32 (21) | 29 (91) | 26.9 (2.0; 21 to 29) | 22.9 (3.0; 18 to 29) | 1.6 (1 to 4) | 21 (66) | 16 (10.5 to 23.0) |
| (3) Children only after onset of MS | 58 (38) | 57 (98) | 21.7 (3.9; 9 to 28) | 27.6 (4.8; 19 to 43) | 1.6 (1 to 4) | 30 (52) | 21 (14.75 to 27.75) |
| (4) Children before and after onset of MS | 13 (9) | 12 (92) | 26.3 (2.1; 22 to 29) | 23.4 (3.3; 19 to 29) | 2.7 (2 to 5) | 6 (46) | 21.5 (14.25 to 29.0) |