Table 3.
Frequency of mental comorbidities at onset and diagnosis of multiple sclerosis, and mean duration of these diagnoses prior to the onset and diagnosis of multiple sclerosis
| Comorbidity | Responses to Question, n | Affected at onset, n (%) | Mean (SD) duration before onset (yrs) | Affected at diagnosis, n (%) | Mean (SD) duration before diagnosis (yrs) |
|---|---|---|---|---|---|
| Depression | 8337 | 613 (7.4) | 6.0 (6.6) | 1431 (17.2) | 6.6 (7.5) |
| Anxiety | 8570 | 233 (2.7) | 5.8 (6.0) | 534 (6.2) | 6.7 (7.2) |
| Bipolar disorder | 8806 | 44 (0.5) | 7.0 (6.1) | 86 (1.0) | 9.0 (7.8) |
| Schizophrenia | 8846 | 5 (0.06) | 7.8 (8.8) | 7 (0.08) | 10.1 (8.0) |