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The expression of Smad3 in chordoma tissues
| Biological characteristics | n | Positive | Negative | χ 2 | p |
|---|---|---|---|---|---|
| Age (years) | |||||
| >60 | 24 | 16 | 8 | 0 | 1 |
| ≤60 | 30 | 20 | 10 | ||
| Gender | |||||
| Male | 38 | 26 | 12 | 0.178 | 0.673 |
| Female | 16 | 10 | 6 | ||
| Relapse | |||||
| Yes | 14 | 10 | 4 | 0.193 | 0.661 |
| No | 40 | 26 | 14 | ||
| Surrounding invasion | |||||
| Yes | 36 | 28 | 8 | 6 | 0.014 |
| No | 18 | 8 | 10 | ||
| Enneking stage | |||||
| IA | 2 | 1 | 1 | 0.26 | 0.878 |
| IB | 49 | 33 | 16 | ||
| III | 3 | 2 | 1 | ||
