Table 3.
Demographic and clinicopathological features of patients receiving adjuvant chemotherapy and adjuvant chemoradiotherapy after propensity score matching.
| Variable | Adjuvant Chemotherapy (n = 4,081) | Adjuvant CRT (n = 4,081) | P Value |
|---|---|---|---|
| Age | 0.976 | ||
| 40–59 | 1,126 (27.6%) | 1,125 (27.6%) | |
| 60–79 | 2,771 (67.9%) | 2,776 (68%) | |
| >80 | 184 (4.5%) | 180 (4.4%) | |
| Sex | 0.877 | ||
| Female | 1,978 (48.5%) | 1,971 (48.3%) | |
| Male | 2,103 (51.5%) | 2,110 (51.7%) | |
| Primary Site | 0.970 | ||
| Head | 3,131 (76.7%) | 3,125 (76.6%) | |
| Body/tail | 647 (15.9%) | 655 (16%) | |
| Other | 303 (7.4%) | 301 (7.4%) | |
| Grade | 0.963 | ||
| 1 | 346 (8.5%) | 337 (8.3%) | |
| 2 | 2,081 (51%) | 2,086 (51.1%) | |
| 3 | 1,421 (34.8%) | 1,423 (34.9%) | |
| 4 | 25 (0.6%) | 30 (0.7%) | |
| Unknown | 208 (5.1%) | 205 (5%) | |
| Tumor Size | 0.987 | ||
| ≤2 cm | 564 (13.8%) | 567 (14%) | |
| 2–4 cm | 2,499 (61.2%) | 2,492 (61%) | |
| >4 cm | 1,018 (25%) | 1,022 (25%) | |
| Stage | 0.977 | ||
| I | 312 (7.6%) | 314 (7.7%) | |
| II | 3,647 (89.4%) | 3,642 (89.2%) | |
| III | 122 (3%) | 125 (3.1%) | |
| T | 0.984 | ||
| T1 | 155 (3.8%) | 160 (4%) | |
| T2 | 434 (10.6%) | 438 (10.7%) | |
| T3 | 3,370 (82.6%) | 3,358 (82.3%) | |
| T4 | 122 (3%) | 125 (3%) | |
| Nodal status | 0.942 | ||
| Negative | 1,219 (30%) | 1,216 (30%) | |
| Positive | 2,862 (70%) | 2,865 (70%) |
CRT, chemoradiotherapy.