Table. Characteristics of Patients and Cancers Included in Primary Analysis.
| Characteristic | Patients, No. (%) |
|---|---|
| Patients, No. | 269 |
| Age, median (IQR), y | 69 (62-75) |
| Sex | |
| Male | 217 (80.7) |
| Female | 52 (19.3) |
| ECOG performance status | |
| 0 | 262 (97.4) |
| 1 | 6 (2.2) |
| 2 | 1 (0.4) |
| Tumor location | |
| Upper thoracic esophagus | 41 (15.2) |
| Middle thoracic esophagus | 153 (56.9) |
| Lower thoracic esophagus | 75 (27.9) |
| Macroscopic typea | |
| 0-I | 11 (4.1) |
| 0-IIa | 22 (8.2) |
| 0-IIb | 6 (2.2) |
| 0-IIc | 121 (45.0) |
| Mixed | |
| Including 0-I | 42 (15.6) |
| Not including 0-I | 67 (24.9) |
| Tumor diameter, median (IQR), cm | 2.0 (1.5-3.0) |
| Tumor circumference | |
| <1/4 | 95 (35.3) |
| ≥1/4 to <1/2 | 95 (35.3) |
| ≥1/2 to <3/4 | 56 (20.8) |
| ≥3/4 | 23 (8.6) |
| Procedure time of non-ME and ME, median (IQR), min | 8 (6-11) |
| Diagnoses by non-ME and ME | |
| Clinical MM/SM1 | 195 (72.5) |
| Clinical SM2 | 74 (27.5) |
| Procedure time of EUS, median (IQR), min | 9 (6-13) |
| Scanning method of EUS | |
| Water–filling | 131 (48.7) |
| Jelly–filling | 118 (43.9) |
| Water–filled balloon | 20 (7.4) |
| Diagnoses by non-ME and ME plus EUS | |
| Clinical EP/LPM | 22 (8.2) |
| Clinical MM/SM1 | 144 (53.5) |
| ≤Clinical SM2 | 103 (38.3) |
| Confidence level of EUS diagnoses | |
| Low | 109 (40.5) |
| High | 160 (59.5) |
| Resection | |
| Endoscopic | 200 (74.3) |
| Surgical | 69 (25.7) |
Abbreviations: ECOG, Eastern Cooperative Oncology Group; EP, epithelium; EUS, endoscopic ultrasonography; IQR, interquartile range; LPM, lamina propria; ME, magnifying endoscopy; MM, muscularis mucosa; non–ME, nonmagnifying endoscopy; SM, submucosa.
a
Type 0-I indicates protruded lesion; type 0-IIa, superficial and elevated lesion; type 0-IIb, flat lesion; and type 0-IIIc, superficial and depressed lesion.