Roel Bogie

Evaluation of polypectomy quality indicators of large, nonpedunculated colorectal polyps in a nonexpert, bowel cancer screening cohort

Table 5.2: LNPCP lesion and colonoscopy characteristics in the national and regional cohort.

National cohort n = 11 130#

Regional cohort n = 332#

LNPCP lesion characteristics

P v alue

Median size, mm (IQR) Proximal location, n (%)

25.0 (20-35)

30.0 (20-40)

0.012 0.811 0.067

5788 (52)

175 (53)

Location

Colon

8297 (75) 4016 (36) 2833 (25)

262 (79) 117 (35) 70 (21)

Cecum/ascending colon

Rectum

Morphology, n (%)

0.004

5

Sessile

8107 (73) 2904 (26)

267 (80) 65 (20)

Flat

Unknown

83 (1)

0

Paris classification, n (%) Is

267 (80) 45 (14)

IIa

IIa+c

7 (2) 7 (2) 5 (2)

IIb IIc

IIc+a

1 (0.3)

SMSA-score^, n (%) SMSA-3

139 (42) 96 (29) 97 (29)

SMSA-3/4

SMSA-4

Index colonoscopy characteristics BBPS ≥6, n (%)

10 696 (96) 10 903 (98)

275/282 (98) 274/282 (97)

0.235 0.315

Cecal intubation rate, n (%)

Mean cecal withdrawal time, minutes (SD)* 29.7 (18.0)

28.4 (14.8)

0.160

Treatment strategy index colonoscopy, n (%)

0.661

Snare resection (with coagulation)

7746 (70)

226 (68)

Biopsy/not removed

3347 (30)

94 (31)

Other**

37 (0.3)

2 (1)

95