Table 4 Subgroup analysis of treatment outcomes based on operator level after propensity score matching.
Expert (n = 154) | Trainee (n = 64) | |||||
|---|---|---|---|---|---|---|
No. of lesions | m-EMR (n = 76) | ESD (n = 78) | P value | m-EMR (n = 33) | ESD (n = 31) | P value |
Treatment outcomes | ||||||
Procedural time, median (range), min | 5.5 (3–17) | 22 (7–97) | < 0.001* | 6 (2–13) | 40 (20–120) | < 0.001* |
En bloc resection | 76 (100%) | 78 (100%) | 1.00 | 33 (100%) | 31 (100%) | 1.00 |
Resection margin | ||||||
Negative | 69 (90.8%) | 70 (89.7%) | 0.684 | 29 (87.9%) | 20 (64.5%) | 0.017* |
Indeterminate | 2 (2.6%) | 4 (5.1%) | 3 (9.1%) | 2 (6.5%) | ||
Positive | 5 (6.6%) | 4 (5.1%) | 1 (3.0%) | 9 (29.0%) | ||
Adverse events | ||||||
Postprocedure bleeding | 2 (2.6%) | 2 (2.6%) | 1.00 | 4 (12.1%) | 1 (3.2%) | 0.356 |
Perforation | 1 (1.3%) | 0 (0%) | 0.494 | 0 (0%) | 1 (0%) | 0.484 |
