Table 1.
Some variable parameters from all, generalized, and ocular myasthenia gravis cases.
| All | Generalized | Ocular | |
|---|---|---|---|
| n | 97 | 85 | 12 |
| Male | 53.6% | 51.8% | 66.7% |
| Age | 54 (17.9) | 53.4 (16.9) | 55.7 (24.6) |
| Age of debut | 43.3 (19.6) | 42.3 (18.5) | 50.8 (25) |
| Time of symptoms (months) | 61.9 (1–330) | 62.6 (1–330) | 56.6 (2–228) |
| Thymectomy | 48.5% | 54.1% | 8.3% |
| Thymoma | 19.6% | 22.4% | 0% |
| Myasthenic crisis | 21.6% | 24.7% | 0% |
| Pyridostigmine | 98.9% | 96.5% | 100% |
| Prednisone | 70.5% | 70.6% | 41.7% |
| Azathioprine | 26.8% | 30.6% | 0% |
| AbAChR abnormal | 84.5% | 89.4% | 50% |
| AbAChR mean value (nmol/L) | 14.1 | 15.9 | 1.84 |
| AbMuSK abnormal | 2.1% | 2.4% | 0% |
| AbAChR or AbMuSK abnormal | 86.6% | 91.8% | 50% |
| Striated muscle antibody abnormal | 22.7% | 24.7% | 8.3% |
| Cases with abnormal decrement | 78.4% | 85.9% | 25% |
| Mean percentage of decrement | 25.9% | 28.7% | 5.9% |
| Any abnormal jitter parameter | 93.8% | 92.9%* | 100%** |
| Some impulse blocking | 19.3% | 20.9% | 5.8% |
*
One muscle tested = 91.3%, and two muscles tested = 93.5%.
**
In 5/10 cases, just one of two muscles tested was abnormal.
AbAChR, acetylcholine receptor antibody; AbMuSK, muscle-specific kinase antibody (SD).