Table 2 Association analysis and univariate analysis for logarithm 10 levels of IL-8 among colorectal cancer patients.

Association analyses (Mann–Whitney U or Kruskall–Wallis test)				Univariate hazard ratio for disease-specific survival³
	Median value (pg/ml)	IQR	p value¹		HR	95% CI	p value⁴
Gender
Female	43	32–64	0.802		1.67	0.96–2.9	0.067
Male	46	33–60			2.39	1.42–4.02	0.001
Age
≤ 67	46	35–63	0.221		1.86	1.05–3.28	0.033
> 67	42	32–59			2.37	1.42–3.95	0.001
Stage				Stage groups
I	37	28–47	< 0.001²	I–II	1.02	0.34–3.11	0.968
II	43	35–57		III–IV	1.67	1.11–2.53	0.015
III	40	31–61
IV	60	45–110
Histology
Non-mucinous	43	33–60	0.800		1.85	1.24–2.75	0.003
Mucinous	45	31–76			7.76	1.57–38.3	0.012
Side
Right	49.46	37–68	0.005		2.34	0.99–5.52	0.052
Left	41.62	31–58			2.29	1.48–3.55	< 0.001
Location
Colon	49	35–66	0.005		2.19	1.23–3.88	0.008
Rectum	41	31–57			2.23	1.31–3.80	0.003

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