Table I.

Comparison of the relative expression levels of miR-27a and miR-31 among patients with different data in observation group.

Variable	n	miR-27a	t value	P-value	miR-31	t value	P-value
Sex			0.388	0.703		0.017	0.986
Male	23	0.0086±0.0009			0.00625±0.0008
Female	17	0.0085±0.0009			0.00621±0.0008
Tumor site			0.000	1.000		0.000	1.000
Rectum	16	0.0085±0.0009			0.00623±0.0009
Colon	24	0.0085±0.0009			0.00623±0.0008
Lymph node metastasis			4.307	<0.001		11.742	<0.001
Yes	23	0.0135±0.0008			0.00836±0.0010
No	17	0.0063±0.0001			0.00515±0.0006
Distant metastasis			31.929	<0.001		4.120	<0.001
Yes	12	0.0165±0.0011			0.00716±0.0009
No	28	0.0059±0.0009			0.00598±0.0008
Histological type						3.907	<0.001
Mucinous carcinoma	7	0.0076±0.0010			0.00601±0.0008
Non-mucinous carcinoma	33	0.0099±0.0008			0.00656±0.0009
Duke's grade			49.602	<0.001		15.859	<0.001
A and B	30	0.0035±0.0010			0.00413±0.0010
C and D	10	0.0212±0.0009			0.00959±0.0007