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| Subgroups | Masaoka stage | P value | MG | P value | ||||
|---|---|---|---|---|---|---|---|---|
| I | II | III | IV | + | − | |||
| WHO histology | <0.001 | 0.034 | ||||||
| A | 7 | 4 | 3 | 0 | 3 | 12 | ||
| AB | 16 | 7 | 4 | 2 | 10 | 19 | ||
| B1 | 11 | 7 | 4 | 2 | 7 | 17 | ||
| B2 | 1 | 3 | 4 | 2 | 6 | 4 | ||
| B3 | 2 | 1 | 3 | 5 | 2 | 9 | ||
| C | 0 | 1 | 8 | 9 | 1 | 17 | ||
| MG | 0.12 | − | ||||||
| + | 15 | 14 | 8 | 4 | − | − | ||
| − | 33 | 18 | 27 | 20 | − | − | ||
WHO, World Health Organization; MG, myasthenia gravis.
