Table 2.
Demographics and tumor variables by treatment type.
| Mean ± SD or number (% within group) | p | Mean ± SD or number (% within group) | p | |||
|---|---|---|---|---|---|---|
| RT (n = 33) | No RT (n = 67) | Chemo (n = 8) | No chemo (n = 92) | |||
| Age (years) | 59.1 ± 15.8 | 62.9 ± 15.6 | 0.258 | 49.5 ± 21.3 | 62.7 ± 14.8 | *0.022 |
| Male | 24 (73) | 35 (52) | 0.056 | 6 (75) | 53 (58) | 0.466 |
| Female | 9 (27) | 32 (48) | 2 (25) | 39 (42) | ||
| Smoking | 19 (58) | 43 (64) | 0.662 | 4 (50) | 58 (63) | 0.474 |
| Alcohol | 15 (63) (n = 24) | 30 (58) (n = 52) | 0.467 | 4 (80) (n = 5) | 41 (58) (n = 71) | 0.643 |
| Death | 15 (45) | 37 (55) | 0.400 | 4 (50) | 48 (52) | 1.000 |
| F/u time (months) | 45.5 ± 38.9 | 68.7 ± 52.8 | *0.028 | 32.8 ± 23.2 | 63.5 ± 50.6 | 0.094 |
| pT1 | 13 (39) | 38 (57) | 0.137 | 1 (13) | 50 (54) | *0.029 |
| pT2 | 20 (61) | 29 (43) | 7 (87) | 42 (46) | ||
| pN0 | 17 (52) | 52 (78) | *0.011 | 1 (13) | 68 (74) | *0.001 |
| pN1 or pN2 | 16 (48) | 15 (22) | 7 (87) | 24 (26) | ||
| Margin + | 5 (13) | 2 (3) | *0.038 | 2 (25) | 5 (5) | 0.096 |
| PNI | 13 (39) | 8 (12) | *0.003 | 3 (38) | 18 (20) | 0.359 |
| LVI | 5 (15) | 7 (10) | 0.523 | 3 (38) | 9 (10) | *0.031 |
| Poor diff | 12 (36) | 12 (18) | *0.050 | 2 (25) | 22 (33) | 1.000 |
| ECS | 5 (15) | 3 (4) | 0.111 | 3 (38) | 5 (5) | *0.016 |
| >4 nodes | 3 (9) | 3 (4) | 0.393 | 2 (25) | 4 (4) | 0.072 |
| Overall recurrence | 8 (24) | 10 (15) | 0.277 | 1 (13) | 17 (18) | 1.000 |
| Local recurrence | 5 (15) | 7 (10) | 0.524 | 0 (0) | 12 (13) | 0.591 |
| Neck recurrence or mets | 4 (12) | 4 (6) | 0.433 | 1 (13) | 10 (11) | 1.000 |
P-values refer to comparison between treatment and no treatment for RT or chemotherapy. SD, standard deviation; RT, radiation therapy; F/u, follow-up; PNI, perineural invasion; LVI, lymphovascular invasion; Poor diff, poorly differentiated; ECS, extracapsular spread; mets, metastasis.
Significant results are indicated by asterisks.