Table 2. Comparison of plasma retinoin-1 levels of colorectal cancer patients with different pathological parameters ($\overline{x}\pm s$, ng/mL).

Pathological parameters	Case	Recurrence group (n=89)	t/F	P
Gender
Male	182	70.32±20.47	0.962	0.337
Female	137	67.99±22.61
Age (year)
<60	171	68.19±24.35	0.967	0.334
≥60	148	70.63±20.08
Tumor site
Colon	204	69.07±24.73	0.244	0.807
Rectum	115	69.76±23.29
TNM staging
I–II	135	65.92±25.43	2.370	0.018
III–IV	184	71.81±18.96
Differentiated degree
High and moderate differentiation	224	70.64±24.07	1.549	0.122
Low differentiation	95	66.21±21.56
Pathological pattern
Adenocarcinoma	229	70.02±21.80	0.938	0.349
Others	90	67.54±22.35
Tumor types
Infiltrating type	33	70.19±19.51	0.926	0.397
Ulcerative type	164	70.78±21.74
Protrude type	122	67.12±24.96
Lymphatic metastasis
Yes	104	74.12±19.08	2.641	0.009
No	215	66.86±24.16
Vessel carcinoma embolus
Yes	76	74.19±18.62	1.700	0.090
No	243	68.11±23.87