Table 2 Surgical and postoperative pathological characteristics, and treatment of the SGC and MGC of the entire cohort (n = 4107) and after propensity score matching (n = 665)
Parameters | Entire cohort (before matching) | P value | Propensity score matched cohort | P value | ||
|---|---|---|---|---|---|---|
SGC, n (%) | MGC, n (%) | SGC, n (%) | MGC, n (%) | |||
Surgical approach | Â | Â | 0.414 | Â | Â | 0.959 |
 Open | 802 (20.2) | 23 (17.3) |  | 93 (17.5) | 23 (17.3) |  |
 Laparoscopic | 3172 (79.8) | 110 (82.7) |  | 439 (82.5) | 110 (82.7) |  |
Type of gastrectomy | Â | Â | < 0.001 | Â | Â | 1.000 |
 Total | 2129 (53.6) | 106 (79.7) |  | 424 (79.7) | 106 (79.7) |  |
 Distal | 1782 (44.8) | 27 (20.3) |  | 108 (20.3) | 27 (20.3) |  |
 Proximal | 63 (1.6) | 0 (0.0) |  | 0 (0.0) | 0 (0.0) |  |
Number of eLNs | Â | Â | 0.547 | Â | Â | 0.514 |
 ≤ 15 | 161 (4.1) | 4 (3.0) |  | 11 (2.1) | 4 (3.0) |  |
 > 15 | 3813 (95.9) | 129 (97.0) |  | 521 (97.9) | 129 (97.0) |  |
pT stage | Â | Â | 0.033 | Â | Â | 0.706 |
 T1 | 983 (24.7) | 20 (15.0) |  | 98 (18.4) | 20 (15.0) |  |
 T2 | 446 (11.2) | 17 (12.8) |  | 54 (10.2) | 17 (12.8) |  |
 T3 | 1165 (29.3) | 37 (27.8) |  | 144 (27.1) | 37 (27.8) |  |
 T4a | 1380 (34.7) | 59 (44.4) |  | 236 (44.4) | 59 (44.4) |  |
pN stage | Â | Â | 0.035 | Â | Â | 0.909 |
 N0 | 1442 (36.3) | 37 (27.8) |  | 157 (29.5) | 37 (27.8) |  |
 N1 | 601 (15.1) | 16 (12.0) |  | 73 (13.7) | 16 (12.0) |  |
 N2 | 680 (17.1) | 23 (17.3) |  | 86 (16.2) | 23 (17.3) |  |
 N3 | 1251 (31.5) | 57 (42.9) |  | 216 (40.6) | 57 (42.9) |  |
pTNM stage | Â | Â | 0.041 | Â | Â | 0.430 |
 Stage I | 1143 (28.8) | 25 (18.8) |  | 123 (23.1) | 25 (18.8) |  |
 Stage II | 875 (22.0) | 32 (24.1) |  | 107 (20.1) | 32 (24.1) |  |
 Stage III | 1956 (49.2) | 76 (57.1) |  | 302 (56.8) | 76 (57.1) |  |
Tumor size | Â | Â | 0.222 | Â | Â | 0.843 |
 ≤ 5 cm | 2652 (66.7) | 82 (61.7) |  | 323 (60.7) | 82 (61.7) |  |
 > 5 cm | 1322 (33.3) | 51 (38.3) |  | 209 (39.3) | 51 (38.3) |  |
Tumor histological type | Â | Â | 0.640 | Â | Â | 0.860 |
 Differentiated | 1150 (28.9) | 36 (27.1) |  | 140 (26.3) | 36 (27.1) |  |
 Undifferentiated | 2824 (71.1) | 97 (72.9) |  | 392 (73.7) | 97 (72.9) |  |
Postoperative complications | Â | Â | 0.242 | Â | Â | 0.481 |
 Absent | 3182 (80.1) | 101 (75.9) |  | 419 (78.8) | 101 (75.9) |  |
 Present | 792 (19.9) | 32 (24.1) |  | 113 (21.2) | 32 (24.1) |  |
Adjuvant chemotherapya | Â | Â | 0.069 | Â | Â | 0.852 |
 No | 1263 (42.2) | 38 (33.6) |  | 150 (34.6) | 38 (33.6) |  |
 Yes | 1728 (57.8) | 75 (66.4) |  | 284 (65.4) | 75 (66.4) |  |