Table 1.
Patient Demographics of overall cohort and summarized by stage IA and IB
| Variable | IA | IB | Overall | p-value |
|---|---|---|---|---|
| Age (mean, standard deviation) | 66.5 ± 11.2 | 65.1 ± 13.2 | 65.6 ± 12.5 | 0.043 |
| Gender (n, % male) | 675 (45.7) | 1130 (46.5) | 1805 (46.2) | 0.64 |
| Race (n, %) | ||||
| White | 1234 (83.5) | 2019 (83.0) | 3253 (83.2) | 0.14 |
| Black | 155 (10.5) | 297 (12.2) | 452 (11.6) | |
| Asian | 18 (1.2) | 19 (0.8) | 37 (0.9) | |
| Other | 70 (4.7) | 97 (4.0) | 167 (4.3) | |
| Charlson-Deyo score | ||||
| 0 | 942 (63.8) | 1582 (65.0) | 2524 (64.6) | 0.55 |
| 1 | 424 (28.7) | 659 (27.1) | 1083 (27.7) | |
| 2 | 111 (7.5) | 191 (7.9) | 302 (7.7) | |
| Primary site | ||||
| Head | 840 (56.9) | 1314 (54.0) | 2154 (55.1) | <0.001 |
| Body/Tail | 377 (25.5) | 767 (31.5) | 1144 (29.3) | |
| Other/Overlapping | 260 (17.6) | 351 (14.5) | 611 (15.6) | |
| Grade | ||||
| Well differentiated | 327 (22.1) | 356 (14.6) | 683 (17.5) | <0.001 |
| Moderately differentiated | 638 (43.2) | 1105 (45.4) | 1743 (44.6) | |
| Poorly differentiated | 242 (16.4) | 587 (24.1) | 829 (21.2) | |
| Undifferentiated | 270 (18.3) | 384 (15.8) | 654 (16.7) | |
| Lymph nodes resected (mean, standard deviation) | 12.9 ± 9.4 | 12.2 ± 8.5 | 12.5 ± 8.9 | 0.08 |
| Margins | ||||
| Positive | 81 (5.6) | 214 (8.9) | 295 (7.6) | <0.001 |
| Negative | 1375 (94.4) | 2191 (91.1) | 3566 (92.4) | |
| Adjuvant chemotherapy | 592 (40.1) | 1185 (48.7) | 1777 (45.5) | <0.001 |
| Adjuvant chemoradiation | 223 (15.1) | 556 (22.9) | 779 (19.9) | <0.001 |