Table 4.

Results of multivariate prognostic analysis affecting OS.

	HR (95% CI)	P
Tumor size, cm
< 2	1 (ref)	–
2–4	7.008 (0.937–52.414)	0.058
> 4	9.082 (1.226–67.305)	0.031
Hemoglobin value, g/L
≥ 110	1 (ref)	–
90 ≤ HB < 110	1.131 (0.670–1.908)	0.582
30 ≤ HB < 90	5.529 (2.012–15.193)	< 0.001
Chemotherapy*	0.328 (0.211–0.510)	< 0.001
Age, years	1.127 (0.749–1.696)	0.565
Pelvic lymph node metastasis	2.275 (1.410–3.672)	0.001
Clinical staging	1.283 (0.805–2.047)	0.295
Retroperitoneal lymph node metastasis*	1.621 (0.665–3.951)	0.288
SCC-Ag	1.255 (0.842–1.870)	0.264

SPSS Spearman method was used to analyze the correlation between clinical stage, tumor size and lymph node metastasis, and the correlation coefficients were (r = 0.412, r = 0.198). The results showed that clinical stage and tumor size were correlated with lymph node metastasis (P < 0.001).

HB hemoglobin.

*Yes or no.