Table 1.
Demographic and clinical data of the MG patients
| Feature | Patients | Female/male ratio |
|---|---|---|
| Age, yearsa | 53.7 ± 16.9 | |
| Age at disease onset, yearsa | 43.9 ± 18.5 | |
| Age at disease onset | ||
| <40 years (early onset) | 48 (44.4) | 36/12 |
| ≥40 years (late onset) | 60 (55.6) | 25/35 |
| Anti-AchR antibody status | ||
| Negative (<0.4 nM) | 27 (25.0) | 17/10 |
| Positive (≥0.4 nM) | 81 (75.0) | 44/37 |
| Presenting symptoms at disease onset | ||
| Ocular weakness | 79 (73.1) | 42/37 |
| Bulbar weakness | 28 (25.9) | 18/10 |
| Limb weakness | 44 (40.7) | 30/14 |
| Clinical disease type | ||
| Ocular MG | 21 (19.4) | 6/15 |
| Generalized MG | 87 (80.6) | 55/32 |
| Thymic pathology | 49 | 38/11 |
| Thymoma | 12 (24.5) | 8/4 |
| Thymus hyperplasia | 28 (57.1) | 23/5 |
| Normal or atrophic | 9 (18.4) | 7/2 |
| Concomitant autoimmunity | 22 (20.4) | 17/5 |
| Graves' disease | 10 (9.3) | 7/3 |
| Hashimoto thyroiditis | 12 (11.2) | 10/2 |
| Other | 0 | 0 |
Values are presented as numbers (%) unless otherwise stated. MG, myasthenia gravis.
a
Expressed as mean ± standard deviation.