Table 1 Characteristics of patients in the study
Characteristic | n (%) | SMI1 | P value2 |
|---|---|---|---|
Sex |  |  | < 0.001 |
 Female | 285 (58%) | 42 (37–47) |  |
 Male | 207 (42%) | 53 (46–62) |  |
Race | Â | Â | 0.5 |
 Caucasian | 441 (90%) | 46 (40–54) |  |
 African American | 41 (8.3%) | 46 (41–57) |  |
 Other | 10 (2.0%) | 47 (39–49) |  |
Smoking | Â | Â | 0.4 |
 Current | 124 (25%) | 45 (41–55) |  |
 Past | 318 (65%) | 46 (40–54) |  |
 Never | 50 (10%) | 45 (39–51) |  |
Histology | Â | Â | 0.8 |
 Adeno | 324 (66%) | 46 (40–53) |  |
 Other | 20 (4.1%) | 46 (42–50) |  |
 SCC | 148 (30%) | 46 (39–58) |  |
Stage | Â | Â | 0.9 |
 I | 321 (65%) | 46 (40–54) |  |
 II | 133 (27%) | 46 (40–56) |  |
 III | 38 (7.7%) | 46 (40–53) |  |
Overweight BMI |  |  | < 0.001 |
 Yes | 336 (68%) | 49 (42–57) |  |
 No | 156 (32%) | 42 (36–46) |  |
ASA score | Â | Â | 0.3 |
 Low (I/II) | 241 (49%) | 46 (41–55) |  |
 High (III/IV) | 251 (51%) | 46 (39–53) |  |
Chemotherapy | Â | Â | 0.014 |
 Yes | 132 (27%) | 48 (41–58) |  |
 No | 360 (73%) | 45 (40–53) |  |
Radiation | Â | Â | 0.8 |
 Yes | 30 (6.1%) | 47 (41–54) |  |
 No | 462 (94%) | 46 (40–54) |  |
Recurrence | Â | Â | 0.5 |
 No | 361 (73%) | 46 (40–54) |  |
 Yes | 131 (27%) | 46 (40–53) |  |
Death | Â | Â | 0.2 |
 No | 282 (57%) | 46 (41–55) |  |
 Yes | 210 (43%) | 45 (39–53) |  |