Table 1. Clinical and tumor characteristics of patients.
| Variables | SEER Cohort (n=4218) | FMMU Cohort (n=244) | ||
|---|---|---|---|---|
| No. | % | No. | % | |
| Age, years | ||||
| 15-44 | 786 | 18.6 | 43 | 17.6 |
| 45-54 | 634 | 15.1 | 40 | 16.4 |
| 55-64 | 874 | 20.7 | 54 | 22.1 |
| 65-74 | 857 | 20.3 | 44 | 18.1 |
| 75-84 | 736 | 17.5 | 45 | 18.4 |
| 85+ | 331 | 7.8 | 18 | 7.4 |
| Race | ||||
| White | 3491 | 82.8 | 0 | 0 |
| Black | 372 | 8.8 | 0 | 0 |
| Other* | 355 | 8.4 | 244 | 100 |
| Sex | ||||
| Female | 1675 | 39.7 | 100 | 41.0 |
| Male | 2543 | 60.3 | 144 | 59.0 |
| Marital status | ||||
| Unmarried | 1122 | 26.6 | 50 | 20.5 |
| Married | 3096 | 73.4 | 194 | 79.5 |
| Grade | ||||
| I | 755 | 17.9 | 53 | 21.7 |
| II | 1451 | 34.4 | 78 | 32.0 |
| III | 1399 | 33.2 | 80 | 32.8 |
| IV | 613 | 14.5 | 33 | 13.5 |
| Laterality | ||||
| Left | 2127 | 50.4 | 129 | 52.9 |
| Right | 2094 | 49.6 | 115 | 47.1 |
| Site | ||||
| Parotid | 3617 | 85.8 | 196 | 80.3 |
| Submandibular | 550 | 13.0 | 42 | 17.2 |
| Sublingual | 51 | 1.2 | 6 | 2.5 |
| T stage | ||||
| T1 | 1293 | 30.6 | 83 | 34.0 |
| T2 | 1079 | 25.6 | 56 | 23.0 |
| T3 | 944 | 22.4 | 54 | 22.1 |
| T4a | 737 | 16.5 | 37 | 15.2 |
| T4b | 165 | 3.9 | 14 | 5.7 |
| N stage | ||||
| N0 | 2838 | 67.3 | 148 | 68.9 |
| N1 | 590 | 14.0 | 32 | 13.1 |
| N2a | 40 | 0.9 | 3 | 1.2 |
| N2b | 687 | 16.3 | 34 | 13.9 |
| N2c | 27 | 0.6 | 3 | 1.2 |
| N3 | 36 | 0.9 | 4 | 1.7 |
| M stage | ||||
| M0 | 4030 | 95.5 | 232 | 95.1 |
| M1 | 188 | 4.5 | 12 | 4.9 |
| Surgery Performed | ||||
| Yes | 3971 | 94.1 | 244 | 100 |
| None | 247 | 5.9 | 0 | 0 |
| Radiation | ||||
| Yes | 2626 | 62.3 | 162 | 66.4 |
| None | 1592 | 37.7 | 82 | 33.6 |
*Other including American Indian/AK Native, Asian/Pacific Islander.