Role of carbon nanotracers in lymph node dissection of advanced gastric cancer and the selection of preoperative labeling time

Table 2 Basic information of 307 patients

Basic information	Control group		Experimental group		P value
	LTG	LSG	LTG	LSG
Number of cases	77	50	99	81
Gender					> 0.05
Male	44	27	49	45
Female	33	23	50	36
Age, yr	60 ± 17		64 ± 18		> 0.05
Pathological types					> 0.05
Highly differentiated adenocarcinoma	14	10	14	12
Moderately differentiated adenocarcinoma	23	13	30	25
Poorly differentiated adenocarcinoma	29	19	45	40
Other types	11	8	10	4
T stage					> 0.05
1	10	10	6	4
2	20	11	33	27
3	37	22	44	39
4	10	7	16	11
N stage					> 0.05
1	15	6	22	13
2	29	20	40	30
3	33	24	37	38
CEA					> 0.05
Normal	44	20	42	32
Increased	33	30	57	49
CA199					> 0.05
Normal	43	24	50	34
Increase	34	26	49	47
Intraoperative blood loss (mL)	71.13 ± 21.33	90.70 ± 31.77	61.53 ± 20.38	75.69 ± 20.18	< 0.05
Complication	3	0	2	2	> 0.05
Postoperative bleeding	2	0	0	0
Anastomotic fistula	1	0	1	2
Obstruction	0	0	1	0
Postoperative hospital stay (d)	6.55 ± 4.63	7.23 ± 4.51	6.54 ± 4.16	7.21 ± 4.32	> 0.05

LTG: Laparoscopic total gastrectomy; LSG: Laparoscopic subtotal gastrectomy.