Table 4:

The relationship between the concentration of MMP-9 and clinicopathology in the study group (μL/L)

Variable		n	Concentration	t	P
Age (yr)	> 60	164	280.17±28.11	0.409	0.683
	≤60	123	281.51±26.57
BMI (KG/m2)	> 26	189	287.15±25.16	0.884	0.378
	≤26	98	284.51±21.56
Gender	Male	184	279.56±26.15	1.286	0.200
	Female	103	275.46±25.48
Nationality	Han nationality	282	289.56±29.15	0.308	0.759
	Minority	5	285.51±30.45
Residence	City	235	284.11±30.84	0.444	0.657
	Countryside	52	286.15±25.64
Marriage	Married	261	281.51±25.26	1.462	0.145
	Unmarried	26	289.14±26.51
Smoking	Yes	197	287.15±26.48	0.593	0.553
	No	90	289.15±26.52
Drinking	Yes	212	294.85±48.56	0.544	0.587
	No	75	298.45±51.15
Exercise	Yes	31	281.06±25.61	1.759	0.080
	No	256	289.84±26.32
TNM staging	I∼II	168	248.41±35.51	13.982	< 0.001
	III∼IV	119	308.51±36.41
Differentiation degree	Middle differentiation and low differentiation	157	311.51±26.56	12.501	< 0.001
	High differentiation	130	265.16±36.15
Lymph node metastasis	Yes	108	298.86±28.52	10.468	< 0.001
	No	179	260.85±30.55
Infiltration degree	Infiltrating to serosa	139	278.15±35.44	0.733	0.464
	Not infiltrating to serosa	148	280.85±26.55
The type of tumor	Villous adenoma	125	287.41±27.56	0.231	0.818
	Adenoma	162	288.15±26.51