Clinical outcomes of Clutch Cutter endoscopic submucosal dissection for older patients with early gastric cancer

Table 1 Patient characteristics n (%)

	Older group (n = 64)	Non-older group (n = 168)	P value
Mean age	84.2	69.5
Gender ratio (M/F)	44/20	118/50	NS
No. of performance state 3 or 4	5 (7.8)	4 (2.4)
Pre-existing comorbidity
Total prevalence rates	58 (90.6)	123 (73.2)	0.0042
Cerebral infarction	11 (17.2)	17 (10.1)	NS
Cardiovascular disease	23 (35.9)	25 (14.9)	0.0004
Respiratory disease	8 (12.5)	12 (7.1)	NS
Chronic renal dysfunction	8 (12.5)	21 (12.5)	NS
Liver cirrhosis	1 (1.6)	12 (7.1)	NS
Diabetes	20 (31.2)	47 (28.0)	NS
Hypertension	44 (68.8)	98 (58.3)	NS
Senile dementia	7 (10.9)	14 (8.3)	NS
Anti-coagulant therapy	4 (6.3)	12 (7.1)	NS

NS: Not significant.

Table 2 Tumors characteristics

	Older group (n = 64)	Non-older group (n = 168)	P value
Location
Upper	28	39	0.019
Middle	16	55	NS
Lower	20	72	NS
Residual stomach	0	2
Mean tumor size	17.5	15.6	NS
Histological type
Well differentiated	58	149	NS
Moderately differentiated	5	10	NS
Poorly differentiated	0	8	NS
Papillary differentiated	1	1	NS
Category of indication
Guideline lesion	47	118	NS
Lesion included in the expanded indications	17	50	NS

NS: Not significant.

Table 3 Technical outcome n (%)

	Older group (n = 64)	Non-older group (n = 168)	P value
En bloc resection	63 (98.4)	168 (100)	NS
R0 resection	61 (95.3)	168 (100)	0.03
Complications
Intraoperative hemorrhage	0 (0)	0 (0)	NS
Intraoperative perforation	1 (1.6)	0 (0)	NS
Postoperative hemorrhage	1 (1.6)	8 (4.8)	NS
Postoperative perforation	0 (0)	0 (0)	NS

NS: Not significant.

Table 4 Social and economic outcomes n (%)

Parameter	Older group (n = 64)	Non-older group (n = 168)	P value
Worsening of the performance status	3/64 (4.7)	1/168 (0.6)	NS
Mean duration of hospitalization (d)	11.4	10.7	NS
Mean financial cost of admission (JPY)	657040	574890	NS

NS: Not significant.