Table 1 Demographic data of questionnaire responders and non-responders
DEMOGRAPHIC FEATURES | Study Cohort n = 84 | Questionnaire Non-responders (n = 106) | p-value |
|---|---|---|---|
Current age, y, mean (SD) | 20.6 (3.9) | 22.3 (4.2) | NS |
Oldest person, y | 30.4 | 33.8 | |
F:M, n, ratio | F = 68, 4.25:1 | F = 79, 2.9:1 | NS |
Age at onset, y, mean (SD) | 9.2 (4.3) | 9.0 (3.8) | NS |
Disease duration, y, mean (SD) | 12.4 (5.0) | 14.0 (5.5) | NS |