Table 3.

The odds ratios of having low selenium compared to high selenium and the risk of colorectal cancer

Comparison groups	p	OR	95% CI
I vs II	0.0231	2.537	1.16 - 5.56
I vs III	<0.0001	5.22	2.48 - 11.0
I vs IV	<0.0001	13.78	6.31 - 29.82
II vs III	0.0293	2.07	1.11 -3.83
II vs IV	<0.001	5.43	2.82 - 10.44
III vs IV	0.0012	2.64	1.44 - 4.83