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| Subgroups | n | Improved | Stable | P value |
|---|---|---|---|---|
| Masaoka stage | 25 | 0.001 | ||
| I | 11 | 9 | 2 | |
| II | 7 | 7 | 0 | |
| III | 4 | 0 | 4 | |
| IV | 3 | 1 | 2 | |
| WHO histologic type | 21 | 0.709 | ||
| A | 2 | 2 | 0 | |
| AB | 8 | 5 | 3 | |
| B1 | 4 | 3 | 1 | |
| B2 | 5 | 3 | 2 | |
| B3 | 2 | 1 | 1 | |
| Surgical methods | 25 | 1.000 | ||
| Open surgery | 11 | 7 | 4 | |
| Thoracoscopic surgery | 14 | 10 | 4 |
WHO, World Health Organization; MG, myasthenia gravis.
