Table 2
Comparison of baseline EGD characteristics and early GC detection rates between the low-detection group except the lowest detector and high-detection group
| Low (except the lowest) | High | P value | ||||||
| Characteristics of routine EGDs (n, (%)) | ||||||||
| Total | 14 170 | 7743 | ||||||
| Sex, m (n, (%)) | 7843 (55.3) | 4265 (55.1) | 0.70 | |||||
| Mean age (range) | 64.3 (16–99) | 64.3 (17–98) | 0.85 | |||||
| Atrophy | Closed (n, (%)) | 3188 (22.5) | 1552 (20.0) | <0.01 | ||||
| Open (n, (%)) | 4935 (34.8) | 2551 (32.9) | <0.01 | |||||
| Postgastric ER (n, (%)) | 700 (4.94) | 342 (4.42) | 0.08 | |||||
| Detected GCs (n, (%)) | ||||||||
| Total | 70 (0.49) | 64 (0.83) | <0.01 | |||||
| Tumour size (mm) | ≤5 |  | 13 (0.092) |  | 15 (0.19) |  | <0.05 |  |
| 6–10 | 15 (0.106) | 18 (0.23) | <0.05 | |||||
| ≥11 | 42 (0.30) | 31 (0.40) | 0.20 | |||||
Since the endoscopists with the highest and lowest detection rates (2.87% and 0.09%) were so far removed from the detection rates of the other endoscopists, we excluded those data as outliers from this comparative analysis. Therefore, endoscopists were assigned to the low-detection group after exclusion of the lowest detector (n=5; detection rate: 0.19%–0.55%) and the high-detection group (n=5; detection rate: 0.63%–1.12%) for statistical comparative analysis.
EGD, esophagogastroduodenoscopy; ER, endoscopic resection; GC, gastric cancer.