Table 4. The plasma level of HIF-1α of patients with squamous cell carcinoma in different N stages.
| Low level (n, %) | High level (n, %) | Total | |
|---|---|---|---|
| N0 | 24(64.9%) | 13(35.1%) | 37 |
| N1-2 | 4(30.8%) | 9(69.2%) | 13 |
| Total | 28 | 22 | 50 |
X2 = 4.539, P = 0.033.
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