Table 1.
Demographic and clinical characteristics of the patients with esophageal squamous cell carcinoma.
| Characteristics | Patients, n (%) |
|---|---|
| Sex | |
| Female | 54 (7.5) |
| Male | 667 (92.5) |
| Age, median (range), years | 73 (39–96) |
| <69 | 245 (34.0) |
| 69–78 | 261 (36.2) |
| ≥78 | 215 (29.8) |
| SUVmax, median cutoff | 4.7 |
| <4.7 | 362 (50.2) |
| ≥4.7 | 359 (49.8) |
| SUVmax, best cutoff | 3.4 |
| <3.4 | 262 (36.3) |
| ≥3.4 | 459 (63.7) |
| Location | |
| Cervical | 2 (0.3) |
| Upper | 69 (9.6) |
| Middle | 274 (38.0) |
| Lower | 376 (52.1) |
| Clinical N stage | |
| N0 | 484 (67.1) |
| N1 | 182 (25.2) |
| N2 | 50 (6.9) |
| N3 | 5 (0.7) |
| Adjuvant therapy | |
| No | 550 (76.3) |
| Concurrent chemoradiation therapy (CCRT) | 6 (0.8) |
| Radiation therapy (RT) | 9 (1.2) |
| Chemotherapy (CT) | 156 (21.6) |
| Histological grade | |
| 1 | 83 (11.5) |
| 2 | 533 (73.9) |
| 3 | 105 (14.6) |
| 7th pathological T stage | |
| T1 | 427 (59.2) |
| T2 | 85 (11.8) |
| T3 | 200 (27.7) |
| T4a | 4 (0.6) |
| T4b | 5 (0.7) |
| 8th pathological T stage | |
| T1a | 141 (19.6) |
| T1b | 286 (39.7) |
| T2 | 85 (11.8) |
| T3 | 200 (27.7) |
| T4a | 4 (0.6) |
| T4b | 5 (0.7) |
| Pathological N stage | |
| N0 | 385 (53.4) |
| N1 | 185 (25.7) |
| N2 | 108 (15.0) |
| N3 | 43 (6.0) |
| 7th pathological substage | |
| IA | 33 (4.6) |
| IB | 277 (38.4) |
| IIA | 23 (3.2) |
| IIB | 173 (24.0) |
| IIIA | 107 (14.8) |
| IIIB | 60 (8.3) |
| IIIC | 48 (6.7) |
| 7th pathological stage | |
| I | 310 (43.0) |
| II | 196 (27.2) |
| III | 215 (29.8) |
| 8th pathological substage | |
| IA | 22 (3.1) |
| IB | 287 (39.8) |
| IIA | 47 (6.5) |
| IIB | 126 (17.5) |
| IIIA | 51 (7.1) |
| IIIB | 140 (19.4) |
| IVA | 48 (6.7) |
| 8th pathological stage | |
| I | 309 (42.9) |
| II | 173 (24.0) |
| III | 191 (26.5) |
| IV | 48 (6.7) |
| Instrument | |
| Discovery LS | 411 (57.0) |
| Discovery STE | 310 (43.0) |