Table 2.
Patient and tumor characteristics of the experimental group (n = 32) and the control group (n = 36)
| Experimental group (arm A) N (%) |
Control group (arm B) N (%) |
|
|---|---|---|
| Age (years) | ||
| Median (range) | 65 (44–80) | 64 (49–79) |
| Gender | ||
| Male | 22 (68.8) | 30 (83.3) |
| Female | 10 (31.3) | 6 (16.7) |
| Ethnic origin | ||
| Caucasian | 32 (100) | 36 (100) |
| Histology | ||
| Squamous cell carcinoma | 27 (84.4) | 28 (77.8) |
| Adenocarcinoma | 5 (15.6) | 8 (22.2) |
| Histologic grading | ||
| G1 | 0 (0.0) | 1 (2.8) |
| G2 | 16 (50.0) | 18 (50.0) |
| G3 | 11 (34.4) | 10 (27.8) |
| Gx | 5 (15.6) | 7 (19.4) |
| Main tumor location | ||
| Lower third | 9 (28.1) | 15 (41.7) |
| Middle third | 14 (43.8) | 11 (30.6) |
| Upper third | 9 (28.1) | 8 (22.2) |
| Unknown | 0 (0.0) | 2 (5.6) |
| T‑category [15] | ||
| T1 | 1 (3.1) | 1 (2.8) |
| T2 | 2 (6.3) | 0 (0.0) |
| T3 | 20 (62.5) | 20 (55.6) |
| T4 | 8 (25.0) | 13 (36.1) |
| Tx | 1 (3.1) | 2 (5.6) |
| N‑category [15] | ||
| N0 | 7 (21.9) | 8 (22.2) |
| N1 | 14 (43.8) | 14 (38.9) |
| N2 | 7 (21.9) | 7 (19.4) |
| N3 | 3 (9.4) | 3 (8.3) |
| N x | 0 (0.0) | 3 (8.4) |
| N + | 1 (3.1) | 1 (2.8) |
| M‑category [15] | ||
| M0 | 31 (96.9) | 35 (97.2) |
| M1a | 0 (0.0) | 1 (2.8) |
| Mx | 1 (3.1) | 0 (0.0) |