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Cross tabulation and chi-Square test for exon and stage.
| Genotype | Stage |
Fisher’s exact test | ||||
| I | II | III | IV | |||
| Exon 12 | Wild type | 5 | 2 | 16 | 0 | P = 0.060 |
| Mutant | 2 | 2 | 19 | 6 | ||
| Exon 21 | Wild type | 5 | 2 | 25 | 3 | P = 0.581 |
| Mutant | 2 | 2 | 10 | 3 | ||
| Exon 26 | Wild type | 0 | 1 | 10 | 0 | P = 0.196 |
| Mutant | 7 | 3 | 25 | 6 | ||
