Efficacy and safety of endoscopic submucosal dissection for early gastric cancer and precancerous lesions in elderly patients

Table 1 Comparison of general intraoperative information between the two groups

Group	n	En bloc resection	Curative resection	Rate of residual tumors at the base of the primary tumors	Intraoperative blood loss in mL	Operation time in min
Experimental group	39	38 (97.44)	29 (74.36)	1 (2.56)	102.21 ± 9.31	85.32 ± 8.93
Control group	39	28 (71.79)	20 (51.28)	11 (28.21)	76.53 ± 7.83	68.22 ± 7.34
χ2/t value		12.733	10.721	17.412	6.426	5.315
P value		0.001	0.001	0.001	0.001	0.001

Data are n (%).

Table 2 Comparison of postoperative recovery between the two groups

Group	n	Length of hospital stay in d	1-yr recurrence rate	1-yr survival rate	3-yr survival rate
Experimental group	39	13.41 ± 3.25	0 (0.00)	37 (94.87)	29 (74.36)
Control group	39	10.38 ± 2.84	5 (12.82)	33 (84.62)	25 (64.10)
χ2/t value		6.359	7.534	7.683	6.706
P value		0.001	0.001	0.001	0.001

Data are n (%).

Table 3 Comparison of surgical complications between the two groups

Group	n	Fever	Intraoperative perforation	Postoperative bleeding	Overall incidence of surgical complications
Experimental group	39	11 (28.21)	1 (2.56)	2 (5.13)	14 (35.90)
Control group	39	10 (25.64)	0 (0.00)	8 (20.51)	18 (46.15)
χ2 value		0.834	0.000	8.476	6.580
P value		0.361	1.000	0.001	0.001

Data are n (%).

Table 4 Comparison of changes in the function of gastric mucosa between the two groups

Group	n	PG I		PG II		PG I/II
		Before the operation	Before the discharge	Before the operation	Before the discharge	Before the operation	Before the discharge
Experimental group	39	65.31 ± 12.32	95.36 ± 19. 26a	23. 28 ± 2.51	14.20 ± 2.35a	2.72 ± 0.31	5.97 ± 1.52
Control group	39	66.38 ± 12. 48	75.42 ± 13.48a	24.03 ± 3.04	18.05 ± 1.03a	2.71 ± 0.29	4.76 ± 1.21
t value		0.359	153.313	0.728	6.706	0.000	12.832
P value		0.501	0.001	0.342	0.001	1.000	0.001

^aP < 0.05 vs those before the operation.

PG: Pepsinogen.