Table 2.
Association Of EAAT1, DHFR, And Fetuin-A Expression With Clinicopathological Characteristics Of CS
| Characteristic | N | EAAT1 Positive N (%) | χ2 | p | DHFR Positive N (%) | χ2 | p | Fetuin-A Positive N (%) | χ2 | p |
|---|---|---|---|---|---|---|---|---|---|---|
| Age, years | ||||||||||
| <45 | 34 | 20 (58.8) | 0.948 | 0.330 | 20 (58.8) | 3.040 | 0.081 | 20 (58.8) | 1.841 | 0.175 |
| ≥45 | 46 | 22 (47.8) | 18 (39.1) | 20 (43.5) | ||||||
| Sex | ||||||||||
| Male | 43 | 22 (51.2) | 0.067 | 0.796 | 21 (48.8) | 0.067 | 0.796 | 23 (53.5) | 0.453 | 0.501 |
| Female | 37 | 20 (54.1) | 17 (45.9) | 17 (45.9) | ||||||
| Differentiation | ||||||||||
| Well | 58 | 24 (41.4) | 10.484 | 0.005 | 21 (36.2) | 10.841 | 0.004 | 21 (36.2) | 16.347 | <0.001 |
| Moderate | 12 | 10 (83.3) | 9 (75.0) | 11 (91.7) | ||||||
| Poor | 10 | 8 (80.0) | 8 (80.0) | 8 (80.0) | ||||||
| Tumor size | ||||||||||
| <5 cm | 24 | 10 (41.7) | 1.614 | 0.204 | 10 (41.7) | 0.468 | 0.494 | 11 (45.8) | 0.238 | 0.626 |
| ≥5 cm | 56 | 32 (57.1) | 28 (50.0) | 29 (51.8) | ||||||
| AJCC stage | ||||||||||
| I | 29 | 10 (34.5) | 11.987 | 0.007 | 7 (24.1) | 24.108 | <0.001 | 5 (17.2) | 24.812 | <0.001 |
| II | 32 | 16 (50.0) | 13 (40.6) | 18 (56.3) | ||||||
| III | 8 | 6 (75.0) | 8 (100) | 7 (87.5) | ||||||
| IV | 11 | 10 (90.9) | 10 (90.9) | 10 (90.9) | ||||||
| Enneking stage | ||||||||||
| I | 55 | 22 (40.0) | 11.696 | 0.003 | 17 (30.9) | 19.667 | <0.001 | 17 (30.9) | 25.685 | <0.001 |
| II | 15 | 11 (73.3) | 12 (80.0) | 14 (93.3) | ||||||
| III | 10 | 9 (90.0) | 9 (90.0) | 9 (90.0) | ||||||
| Metastasis | ||||||||||
| No | 69 | 33 (47.8) | 4.396 | 0.036 | 28 (40.6) | 9.637 | 0.002 | 30 (43.5) | 8.538 | 0.003 |
| Yes | 11 | 9 (81.8) | 10 (90.9) | 10 (90.9) | ||||||
| Invasion | ||||||||||
| No | 13 | 3 (23.1) | 5.389 | 0.020 | 5 (38.5) | 0.509 | 0.476 | 4 (30.8) | 2.296 | 0.130 |
| Yes | 67 | 39 (58.2) | 33 (49.3) | 36 (53.7) |
Abbreviations: CS, chondrosarcoma; EAAT1, excitatory amino acid transporter 1; DHFR, Dihydrofolate reductase; N, number; AJCC, American Joint Committee on Cancer.