Table 3.
Patient characteristics of the observational NCR cohort
| Variable | Whole population (n = 1,947) | Untreated (n = 1,833) | Treated (n = 114) | t‐test p‐value treated/untreated | Untreated match 11 (n = 76) | Treated match 11 (n = 76) | Untreated match 22 (n = 113) | Treated match 22 (n = 113) |
|---|---|---|---|---|---|---|---|---|
| Age (years) | 70.9 (11.0) | 71.5 (10.8) | 61.7 (10.6) | <0.01 | 64.0 (8.2) | 64.0 (8.2) | 59.5 (11.6) | 61.9 (10.0) |
| pT stage | ||||||||
| T3 | 1,753 (90.0) | 1,678 (91.5) | 75 (65.8) | <0.01 | 68 (89.5) | 68 (89.5) | 85 (75.2) | 75 (66.4) |
| T4 | 194 (10.0) | 155 (8.5) | 39 (34.2) | 8 (10.5) | 8 (10.5) | 28 (24.8) | 38 (33.6) | |
| Number of evaluated lymph nodes | ||||||||
| <10 | 1,050 (53.9) | 975 (53.2) | 75 (65.8) | 0.01 | 57 (75.0) | 57 (75.0) | 82 (72.6) | 75 (66.4) |
| ≥10 | 897 (46.1) | 858 (46.8) | 39 (34.2) | 19 (25.0) | 19 (25.0) | 31 (27.4) | 38 (33.6) | |
| Tumor site | ||||||||
| Right | 1,173 (60.2) | 1,106 (60.3) | 67 (58.8) | 0.82 | 43 (56.6) | 43 (56.6) | 65 (57.5) | 67 (59.3) |
| Left | 774 (39.8) | 727 (39.7) | 47 (41.2) | 33 (43.4) | 33 (43.4) | 48 (42.5) | 46 (40.7) | |
| Tumor differentiation | ||||||||
| Well/moderate | 1,623 (83.3) | 1,543 (84.2) | 80 (70.2) | <0.01 | 58 (76.3) | 58 (76.3) | 89 (78.8) | 79 (69.9) |
| Poor/not | 324 (16.7) | 290 (15.8) | 34 (29.8) | 18 (23.7) | 18 (23.7) | 24 (21.2) | 34 (30.1) |
Data are presented as means (±SD) or numbers (%).
1
Match 1 is the matching sample with caliper score of 0.
2
Match 2 is the matching sample with caliper score of 0.2 multiplying by standard deviation of the logit propensity score.