Table 2 Comparison of characteristics between second-look endoscopy group and non-endoscopy group

Age (year, mean ± SD)

71.5 ± 8.3

71.6 ± 9.2

0.892 (NS)

Gender Man/Woman

163 (77.6%)/47 (22.4%)

172 (72.6%)/65 (27.4%)

0.263 (NS)

Tumor location

 U

30 (14.3%)

45 (19.0%)

0.315 (NS)

 M

79 (37.6%)

97 (40.9%)

0.537 (NS)

 L

101 (48.1%)

95 (40.1%)

0.108 (NS)

Macroscopic type

 Elevated type/Depressed type

115 (54.8%)/95 (45.2%)

132 (55.7%)/105 (44.3%)

0.918 (NS)

Tumor size

(mm, mean ± SD)

16.5 ± 9.0

17.5 ± 11.8

0.309 (NS)

Histopathology

 Adenoma/Carcinoma

30 (14.3%)/180 (85.7%)

41 (17.3%)/196 (82.7%)

0.460 (NS)

Depth of invasion

 M/SM

189 (90.0%)/21 (10.0%)

223 (94.1%)/14 (5.9%)

0.152 (NS)

Heart disease

35 (16.7%)

34 (14.3%)

0.584 (NS)

Renal disease

7 (3.3%)

14 (5.9%)

0.289 (NS)

Hepatic disease

23 (11.0%)

19 (8.0%)

0.368 (NS)

Pulmonary disease

13 (6.2%)

20 (8.4%)

0.661 (NS)

Brain disease

24 (11.4%)

18 (7.6%)

0.221 (NS)

Hypertension

92 (43.8%)

121 (51.1%)

0.126 (NS)

Diabetes mellitus

36 (17.1%)

38 (6.0%)

0.851 (NS)

Hyperlipidemia

23 (11.0%)

41 (17.3%)

0.056 (NS)