Table I. Distribution of cases according to sociodemographic characteristics (stratified according to clinical stage).
| Clinical stages I and II | Clinical stages III and IV | |||||
| IEO | HACC | IEO | HACC | |||
| Mean age (yrs) | 52.5 | 60.7 | p = 0.009 | 50.4 | 54.1 | p = 0.168 |
| Sex (%) | ||||||
| Male | 60.4 | 78.1 | p = 0.098 | 70.3 | 81.6 | p = 0.174 |
| Female | 39.6 | 21.9 | 29.7 | 18.4 | ||
| Use of alcohol n. (%) | 10 (38.2) | 20 (65.3) | p = 0.001 | 13 (23.3) | 47 (64.5) | p = 0.009 |
| Use of tabacco n. (%) | 26 (59.1) | 26 (83.9) | p = 0.022 | 28 (75.7) | 63 (85.1) | p = 0.220 |
| T n. (%) | ||||||
| Tx | 1 (2.1) | 0 | p = 0.305 | 1 (2.7) | 0 | p = 0.001 |
| T1 | 15 (31.3) | 6 (18.75) | 3 (8.1) | 3 (3.9) | ||
| T2 | 32 (66.7) | 26 (81.25) | 23 (62.2) | 14 (18.4) | ||
| T3 | 4 (10.8) | 29 (38.2) | ||||
| T4 | 6 (16.2) | 30 (39.5) | ||||
| cN n. (%) | ||||||
| N0 | 48 (100) | 32 (100) | p = 0.411 | 1 (2.7) | 29 (38.2) | p = 0.002 |
| N1 | 24 (64.9) | 27 (35.5) | ||||
| ≥ N2 | 11 (29.7) | 20 (26.3) | ||||
| pN n. (%) | ||||||
| N0 | 32 (66.7) | 24 (75) | p = 0.426 | 10 (27) | 33 (43.4) | p = 0.092 |
| N+ | 16 (33.3) | 8 (25) | 27 (73) | 43 (56.6) | ||
| N. removed nodes (mean) | 39.4 | 34.0 | p = 0.067 | 37.5 | 50.2 | p = 0.001 |