Table 2.
Univariate analysis for NBI-undetectable lesions
| Characteristic | No. of lesions | NBI-undetectable (n = 20) | NBI-detectable (n = 127) | P-value |
|---|---|---|---|---|
| Endoscope system, n (%) | <0.05 | |||
| H260Z | 70 | 16 (22.9) | 54 (77.1) | |
| HQ290 | 77 | 4 (5.2) | 73 (94.8) | |
| Size, mm, median (range) | 147 | 15 (6–35) | 15 (2–110) | 0.5 |
| Location, n (%) | 0.8 | |||
| Ce+Ut | 42 | 6 (14.3) | 36 (85.7) | |
| Mt | 78 | 11 (14.1) | 67 (85.9) | |
| Lt+Ae | 27 | 3 (11.1) | 24 (88.9) | |
| Position, n (%) | <0.05 | |||
| Anterior wall | 61 | 14 (23.0) | 47 (77.0) | |
| Others | 86 | 6 (7.0) | 80 (93.0) | |
| Macroscopic type, n (%) | <0.05 | |||
| 0-IIb | 97 | 20 (20.6) | 77 (79.4) | |
| Others | 50 | 0 (0) | 50 (100.0) | |
| Pathology, n (%) | 0.4 | |||
| HGIN | 39 | 7 (17.9) | 32 (82.1) | |
| SCC | 108 | 13 (12.0) | 95 (88.0) | |
| Numerous irregularly shaped LVLs, n (%) | <0.05 | |||
| Yes | 71 | 16 (22.5) | 55 (77.5) | |
| No | 76 | 4 (5.3) | 72 (94.7) | |
| Synchronous SESCCs, n (%) | <0.05 | |||
| Yes | 71 | 15 (21.1) | 56 (78.9) | |
| No | 76 | 5 (6.6) | 71 (93.4) |
NBI, narrow-band imaging; Ce, cervical esophagus; Ut, upper thoracic esophagus; Mt, middle thoracic esophagus; Lt, lower thoracic esophagus; Ae, abdominal esophagus; HGIN, high-grade intraepithelial neoplasia; LVLs, Lugol-voiding lesions; SESCC, superficial esophageal squamous cell carcinoma.