Table 3. Spearman's correlation coefficients between four clinical variables and five biomarkers.
| Biomarker | Lymph node | Pathological grade | Extension | Tumour size | EGFR | SIAH | Ki67 | Phospho-ERK | HIF-1α |
|---|---|---|---|---|---|---|---|---|---|
| Lymph node | 1 | ||||||||
| Pathological grade | 1 | ||||||||
| Extension | 1 | ||||||||
| Tumour size | 0.11 | 0.22 | 0.17 | 1 | |||||
| EGFR | 0.16 | 1 | |||||||
| SIAH | 0.11 | 1 | |||||||
| Ki67 | 0.76 | 1 | |||||||
| Phospho-ERK | −0.10 | 0.14 | 1 | ||||||
| HIF-1α | −0.14 | 0.22 | −0.13 | 0.12 | 1 |
Abbreviation: HIF-1α=hypoxia-inducible factor 1α.
Note: only coefficients ⩾0.10 or ⩽−0.10 are shown and those significantly different from 0 are in bold.