Table 3.

Multivariable Cox regression (entire group, n = 300).

Feature		HR	CI (2.5–97.5%)	p-Value
Serum zinc level	A	1.956	1.21–3.17	<0.01
	B	1.344	0.82–2.21	0.245
	C	1.0
Sex	F	1.0	-	-
	M	0.668	0.4–1.12	0.127
Clinical stage	I	1.0	-	-
	II	2.33	0.93–5.83	0.07
	III	2.23	0.98–5.07	0.056
	IV	7.304	3.28–16.26	<0.01
Chemotherapy	Yes	0.802	0.43–1.51	0.494
	No	1.0	-	-
Radiotherapy	Yes	1.197	0.73–1.96	0.473
	No	1.0	-	-
Pack-years		1.011	1–1.02	0.069
Age	≤60	1.0	-	-
	>60	1.37	0.92–2.04	0.122
GPX1	TC/TT	0.987	0.67–1.44	0.945
	CC	1.0
SOD2	TC/TT	1.042	0.68–1.59	0.847
	CC	1.0
CAT	TC/TT	1.09	0.74–1.6	0.661
	CC	1.0