Effect of preoperative injection of carbon nanoparticle suspension on the outcomes of selected patients with mid-low rectal cancer

Table 1 Comparison of clinicopathologic characteristics in two groups of patients with mid-low rectal cancer

Parameter	Experimental group (n = 35)	Control group (n = 52)	P value
Sex			0.968
Men	16	24
Women	19	28
Age (years)^a	60.0 ± 10.7	58.9 ± 9.4	0.631
BMI (kg/m²)^a	23.6 ± 2.9	23.2 ± 2.8	0.505
ASA score			0.448
I	4	3
II	28	41
III	3	8
Concomitant diseases			0.948
Yes	11	16
No	24	36
Tumor size (cm)^a	4.9 ± 2.0	4.6 ± 2.3	0.619
Distance from anal verge (cm)^a	5.6 ± 1.9	5.3 ± 1.7	0.549
Operation type (cases)			0.459
Anterior resection	28	38
Abdominoperineal resection	7	14
TNM stage			0.896
I	3	4
II	6	11
III	26	37
Tumor differentiation			0.602
Well	2	1
Moderate	29	46
Poor	4	5
Pathologic type			0.721
Adenocarcinoma	33	48
Mucinous adenocarcinoma	2	4

Tumor size is the largest diameter under macroscopic examination
BMI body mass index, ASA American society of anesthesiologists
^a These values are presented as mean ± standard deviation; other values are presented as the number of patients

ISSN: 2523-3548