Table 1 Characteristics of the oral cavity cancer study population with a defined treatment modality
Characteristic | Surgery (N = 1674 —60.8%-) | Surgery with adjuvant radiation (N = 518—18.8%) | Surgery with adjuvant CCRT (N = 560—20.4%) | Overall (N = 2752) |
|---|---|---|---|---|
Mean age (SD) | 61.8 (13.2) | 61.1 (12.5) | 58.7 (10.7) | 61.0 (12.7) |
Male (%) | 1017 (60.75%) | 320 (61.78%) | 406 (72.50%) | 1,743 (63.34%) |
Geographic Region (%)* | Â | Â | Â | Â |
 Northeast | 323 (19.90%) | 109 (21.29%) | 111 (20.33%) | 543 (20.25%) |
 North Central | 418 (25.75%) | 145 (28.32%) | 160 (29.30%) | 723 (26.97%) |
 South | 538 (33.15%) | 159 (31.05%) | 176 (32.23%) | 873 (32.56%) |
 West | 344 (21.20%) | 99 (19.34%) | 99 (18.13%) | 542 (20.22%) |
Comorbidities (%) | Â | Â | Â | Â |
 Alcohol abuse | 41 (2.45%) | 15 (2.90%) | 27 (4.82%) | 83 (3.02%) |
 Peripheral vascular disease | 66 (3.94%) | 18 (3.47%) | 22 (3.93%) | 106 (3.85%) |
 Chronic pulmonary disease | 242 (14.46%) | 71 (13.71%) | 103 (18.39%) | 416 (15.12%) |
 Moderate or severe liver disease | 3 (0.18%) | 0 (0%) | 2 (0.36%) | 5 (0.18%) |
Charlson/Deyo Comorbidity Index (%) | Â | Â | Â | Â |
 1 | 1000 (59.74%) | 253 (48.84%) | 201 (35.89%) | 1454 (52.83%) |
 2 | 432 (25.81%) | 168 (32.43%) | 226 (40.36%) | 826 (30.01%) |
 3 | 142 (8.48%) | 58 (11.20%) | 90 (16.07%) | 290 (10.54%) |
  ≥ 4 | 100 (5.97%) | 39 (7.53%) | 43 (7.68%) | 182 (6.61%) |