Table 1 Demographic and clinical characteristics of the patients before and after propensity score matching, n (%)
Before PSM (N = 1424) | After PSM (N = 1188) | |||||
|---|---|---|---|---|---|---|
Clipping group | Non-clipping group | p value | Clipping group | Non-clipping group | p value | |
N = 789 (55.0%) 1037 polyps (53.8%) | N = 635 (45.0%) 888 polyps (46.2%) | N = 612 (51.5%); 806 polyps | N = 576 (48.5%); 806 polyps | |||
Gender/Male | 572 (72.5) | 439 (69.1) | 0.164 | 445 (72.7) | 402 (69.8) | 0.266 |
Age (Mean ± S.D.) | 59.73 ± 11.66 | 60.43 ± 11.57 | 0.192 | 59.63 ± 11.75 | 60.46 ± 11.64 | 0.200 |
Polyp size (mm) (Mean ± S.D.) | 10.09 ± 3.45 | 9.10 ± 3.14 | < 0.001 | 9.32 ± 3.16 | 9.36 ± 3.18 | 0.845 |
Polyp location | < 0.001 | 0.800 | ||||
Proximal | 493 (47.5) | 345 (38.9) | 332 (41.2) | 327 (40.6) | ||
Distal | 544 (52.5) | 543 (61.1) | 474 (58.8) | 479 (59.4) | ||
Polyp shape | 0.927 | 0.136 | ||||
Pedunculated | 134 (12.9) | 134 (12.9) | 93 (11.5) | 113 (14.0) | ||
Sessile | 903 (87.1) | 903 (87.1) | 713 (88.5) | 693 (86.0) | ||
Endoscopist experience | < 0.001 | 0.454 | ||||
< =300 | 384 (37.0) | 249 (30.9) | 263 (32.6) | 249 (30.9) | ||
> 300 | 653 (63.0) | 557 (69.1) | 543 (67.4) | 557 (69.1) | ||
Antispastic agent | 938 (90.5) | 786 (88.5) | 0.165 | 729 (90.4) | 714 (88.6) | 0.223 |
Multiple polypectomies | 433 (41.8) | 441 (49.7) | 0.001 | 323 (40.1) | 401 (49.8) | < 0.001 |
Conscious sedation | 745 (71.8) | 627 (70.6) | 0.551 | 575 (71.3) | 564 (70.0) | 0.547 |
Antiplatelet use history | 46 (4.4) | 28 (3.2) | 0.197 | 35 (4.4) | 26 (3.2) | 0.360 |
Anticoagulant use history | 6 (0.6) | 9 (1.0) | 5 (0.6) | 8 (1.0) | ||
No medication use | 985 (95.0) | 851 (95.8) | 766 (95.0) | 722 (95.8) | ||