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Characteristics of the tumor samples included in each assay
| Total | Experiment | |||
|---|---|---|---|---|
| Immunohistology | RT-PCR | Pyrosequencing | ||
| Tumors with paired background mucosa | 19 | 7 | 13 | 17 |
| Patient gender | ||||
| Male | 16 | 4 | 13 | 15 |
| Female | 3 | 3 | 0 | 2 |
| Patient age | ||||
| Range (years) | 61–85 | 65–85 | 61–85 | 61–85 |
| Cancer stage | ||||
| I | 7 | 2 | 5 | 6 |
| II | 5 | 2 | 3 | 5 |
| III | 6 | 3 | 5 | 5 |
| IV | 1 | 0 | 0 | 1 |
| Tumor location | ||||
| Upper thoracic | 5 | 0 | 4 | 4 |
| Middle thoracic | 8 | 4 | 6 | 7 |
| Lower thoracic | 6 | 3 | 3 | 6 |
