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. 2022 Oct 10;55(3):261–266. doi: 10.1055/a-1924-4711

Table 1. Patient and lesion characteristics in the gel immersion endoscopic resection (GIER) and underwater endoscopic mucosal resection (UEMR) groups.

GIER UEMR P value
Patients, n 19 16
Age, median (range), years 67 (45–81) 63 (35–80) 0.25 1
Sex, n (%) 0.72 2

  • Male

 13 (68.4) 12 (75.0)

  • Female

 6 (31.6) 4 (25.0)
Lesions, n 22 18
Location, n (%) 0.43 3

  • Bulb

 3 (13.6) 1 (5.6)

  • Second portion

 16 (72.7) 16 (88.9)

  • Third portion

 3 (13.6) 1 (5.6)
Macroscopic type, n (%) 0.19 3

  • 0-I

 6 (27.3) 1 (5.6)

  • 0-IIa

 9 (40.9) 10 (55.6)

  • 0-IIc

 3 (13.6) 5 (27.8)

  • 0-IIa + IIc

 4 (18.2) 2 (11.1)

0-I, protruding; 0-IIa, superficial elevated; 0-IIc, superficial depressed.

1

Mann–Whitney–Wilcoxon test.

2

Fisher’s exact test.

3

Likelihood ratio test.