| Total | SPM-Free | SPM | P-valuesc | |||
---|---|---|---|---|---|---|---|
Variable | No. | % | No. | % | No. | % | Â |
Total patients | 1,292 | 100 | 1,172 | 100 | 120 | 100 | Â |
Age | Â | Â | Â | Â | Â | Â | Â |
   ≤ median (57 years) | 668 | 51.7 | 629 | 53.7 | 39 | 32.5 | < 0.001 |
   > median (57 years) | 624 | 48.3 | 543 | 46.3 | 81 | 67.5 |  |
Sex | Â | Â | Â | Â | Â | Â | Â |
   Male | 981 | 75.9 | 887 | 75.7 | 94 | 78.3 | 0.518 |
   Female | 311 | 24.1 | 285 | 24.3 | 26 | 21.7 |  |
Ethnicity | Â | Â | Â | Â | Â | Â | Â |
   Non-Hispanic White | 1,093 | 84.6 | 999 | 85.2 | 94 | 78.3 | 0.050 |
   Other | 199 | 15.4 | 173 | 14.8 | 26 | 21.7 |  |
Smoking | Â | Â | Â | Â | Â | Â | Â |
   Never | 346 | 26.8 | 321 | 27.4 | 25 | 20.8 | 0.122 |
   Ever | 946 | 73.2 | 851 | 72.6 | 95 | 79.2 |  |
Alcohol | Â | Â | Â | Â | Â | Â | Â |
   Never | 337 | 26.1 | 310 | 26.4 | 27 | 22.5 | 0.348 |
   Ever | 955 | 73.9 | 862 | 73.6 | 93 | 77.5 |  |
Index Cancer Site | Â | Â | Â | Â | Â | Â | Â |
   Oral cavity | 420 | 32.5 | 382 | 32.6 | 38 | 31.7 | 0.320 |
   Oropharynx | 575 | 44.5 | 527 | 45.0 | 48 | 40.0 |  |
   Larynx/Hypopharynx | 297 | 23.0 | 263 | 22.4 | 34 | 28.3 |  |
Index Cancer Stage | Â | Â | Â | Â | Â | Â | Â |
   I or II | 327 | 25.3 | 295 | 25.0 | 32 | 26.7 | 0.720 |
   III or IV | 965 | 74.7 | 877 | 75.0 | 88 | 73.3 |  |
Treatment | Â | Â | Â | Â | Â | Â | Â |
   Surgery only | 230 | 17.8 | 209 | 17.8 | 21 | 17.5 | 0.894 |
   Surgery + Adjuvant Txa | 322 | 24.9 | 289 | 24.7 | 33 | 27.5 |  |
   XRTb | 330 | 25.6 | 302 | 25.8 | 28 | 23.3 |  |
   XRT + Chemotherapy | 410 | 31.7 | 372 | 31.7 | 38 | 31.7 |  |