Table 3.
Relationships between clinicopathological characteristics and pathological response evaluated by JGCA-TRG system
| Characteristics | Total cases (n = 192), no. (%) | JGCA -TRG | P value | ||||
|---|---|---|---|---|---|---|---|
| 3 (n = 11), no. (%) | 2 (n = 63), no. (%) | 1b (n = 45), no. (%) | 1a (n = 33), no. (%) | 0 (n = 40), no. (%) | |||
| Gender | 0.097 | ||||||
| Male | 139 (72.4) | 10 (7.2) | 48 (34.5) | 30 (21.6) | 19 (13.7) | 32 (23) | |
| Female | 53 (27.6) | 1 (1.9) | 15 (28.3) | 15 (28.3) | 14 (26.4) | 8 (15.1) | |
| Age | 0.711 | ||||||
| < 55y | 89 (46.4) | 6 (6.7) | 26 (29.2) | 24 (27) | 16 (18) | 17 (19.1) | |
| ≥ 55y | 103 (53.6) | 5 (4.9) | 37 (35.9) | 21 (20.4) | 17 (16.5) | 23 (22.3) | |
| Location | 0.287 | ||||||
| Esophagogastric junction | 44 (22.9) | 1 (2.3) | 12 (27.3) | 10 (22.7) | 10 (22.7) | 11 (25) | |
| Proximal gastric | 71 (37) | 7 (9.9) | 23 (32.4) | 15 (21.1) | 8 (11.3) | 18 (25.4) | |
| Distal gastric | 77 (40.1) | 3 (3.9) | 28 (36.4) | 20 (26) | 15 (19.5) | 11 (14.3) | |
| Maximal diameter of tumor bed | <0.001 | ||||||
| < 4.5 cm | 108 (56.2) | 9 (8.3) | 40 (37) | 27 (25) | 17 (15.7) | 15 (13.9) | |
| 4.5–8 cm | 64 (33.3) | 1 (1.6) | 21 (32.8) | 14 (21.9) | 12 (18.8) | 16 (25) | |
| > 8 cm | 20 (10.4) | 1 (5) | 2 (10) | 4 (20) | 4 (20) | 9 (45) | |
| Histological differentiation | 0.060 | ||||||
| Well-moderate | 45 (23.4) | 4 (8.9) | 21 (46.7) | 10 (22.2) | 6 (13.3) | 4 (8.9) | |
| Poor | 147 (76.6) | 7 (4.8) | 42 (28.6) | 35 (23.8) | 27 (18.4) | 36 (24.5) | |
| Laurén classification | |||||||
| Intestinal | 77 (40.1) | 4 (5.2) | 29 (37.7) | 18 (23.4) | 11 (14.3) | 15 (19.5) | |
| Diffuse | 73 (38) | 7 (9.6) | 20 (27.4) | 16 (21.9) | 16 (21.9) | 14 (19.2) | |
| Mixed | 42 (21.9) | 0 (0) | 14 (33.3) | 11 (26.2) | 6 (14.3) | 11 (26.2) | |
| LVI | <0.001 | ||||||
| Negative | 94 (49) | 11 (11.7) | 46 (48.9) | 19 (20.2) | 8 (8.5) | 10 (10.6) | |
| Positive | 98 (51) | 0 (0) | 17 (17.3) | 26 (26.5) | 25 (25.5) | 30 (30.6) | |
| PNI | <0.001 | ||||||
| Negative | 76 (39.6) | 11 (14.5) | 35 (46.1) | 14 (18.4) | 9 (11.8) | 7 (9.2) | |
| Positive | 116 (60.4) | 0 (0) | 28 (24.1) | 31 (26.7) | 24 (20.7) | 33 (28.4) | |
| AJCC ypT category | <0.001 | ||||||
| 0 | 11 (5.7) | 11 (100) | 0 (0) | 0 (0) | 0 (0) | 0 (0) | |
| 1 | 20 (10.4) | 0 (0) | 17 (85) | 1 (5) | 2 (10) | 0 (0) | |
| 2 | 23 (12) | 0 (0) | 11 (47.8) | 6 (26.1) | 6 (26.1) | 0 (0) | |
| 3 | 57 (29.7) | 0 (0) | 24 (42.1) | 16 (28.1) | 8 (14) | 9 (15.8) | |
| 4 | 81 (42.2) | 0 (0) | 11 (13.6) | 22 (27.2) | 17 (21) | 31 (38.3) | |
| AJCC ypN category | <0.001 | ||||||
| 0 | 55 (28.6) | 9 (16.4) | 30 (54.5) | 5 (9.1) | 5 (9.1) | 6 (10.9) | |
| 1 | 36 (18.8) | 0 (0) | 13 (26) | 11 (30.6) | 5 (13.9) | 7 (19.4) | |
| 2 | 50 (26) | 0 (0) | 13 (26) | 21 (42) | 11 (22) | 5 (10) | |
| 3 | 51 (26.6) | 2 (3.9) | 7 (13.7) | 8 (15.7) | 12 (23.5) | 22 (43.1) | |
| AJCC stage | <0.001 | ||||||
| 0 | 9 (4.7) | 9 (100) | 0 (0) | 0 (0) | 0 (0) | 0 (0) | |
| 1 | 24 (12.5) | 0 (0) | 21 (87.5) | 1 (4.2) | 1 (4.2) | 1 (4.2) | |
| 2 | 53 (27.6) | 2 (3.8) | 20 (37.7) | 12 (22.6) | 9 (17) | 10 (18.9) | |
| 3 | 106 (55.2) | 0 (0) | 22 (20.8) | 32 (30.2) | 23 (21.7) | 29 (27.4) | |
| R0 resection | 0.046 | ||||||
| Yes | 159 (82.8) | 11 (6.9) | 55 (34.6) | 40 (25.2) | 24 (15.1) | 29 (18.2) | |
| No | 33 (17.2) | 0 (0) | 8 (24.2) | 5 (15.2) | 9 (27.3) | 11 (33.3) | |
| Adjuvant chemotherapy | 0.676 | ||||||
| Not received | 59 (30.7) | 3 (5.1) | 16 (27.1) | 13 (22) | 12 (20.3) | 15 (25.4) | |
| Received | 133 (69.3) | 8 (6) | 47 (35.3) | 32 (24.1) | 21 (15.8) | 25 (18.8) | |