| Before PSM | After PSM | ||||||
---|---|---|---|---|---|---|---|---|
Variables | PF group [n (%), n = 425] | TPF group [n (%), n = 177] | X2/Z | P | PF group [n (%), n = 172] | TPF group [n (%), n = 172] | X2/Z | P |
Age (years) [median (IQR)] | 61 (52~67) | 58 (48~63) | −4.017a | <0.001 | 60 (51~64) | 58 (48~63) | −1.399a | 0.162 |
 < 65 | 271 (63.8) | 141 (79.7) | 14.618 | < 0.001 | 130 (75.6) | 136 (79.1) | 0.597 | 0.440 |
 65~ | 154 (36.2) | 36 (20.3) | 42 (24.4) | 36 (20.9) | ||||
Sex | Â | Â | 0.383 | 0.536 | Â | Â | 0.234 | 0.628 |
 Male | 313 (73.6) | 126 (71.2) |  |  | 127 (73.8) | 123 (71.5) |  |  |
 Female | 112 (26.4) | 51 (28.8) |  |  | 45 (26.2) | 49 (28.5) |  |  |
Tumor location | Â | Â | 2.348 | 0.125 | Â | Â | 0.187 | 0.665 |
 Cardia | 214 (50.4) | 77 (43.5) |  |  | 81 (47.1) | 77 (44.8) |  |  |
 Non-cardia | 211 (49.6) | 100 (56.5) |  |  | 91 (52.9) | 95 (55.2) |  |  |
Borrmann subtype | Â | Â | 0.760 | 0.944 | Â | Â | 2.785 | 0.594 |
 I | 13 (3.1) | 5 (2.8) |  |  | 7 (4.1) | 5 (2.9) |  |  |
 II | 125 (29.4) | 57 (32.2) |  |  | 46 (26.7) | 57 (33.1) |  |  |
 III | 241 (56.7) | 94 (53.1) |  |  | 101 (58.7) | 90 (52.3) |  |  |
 IV | 26 (6.1) | 12 (6.8) |  |  | 12 (7.0) | 11 (6.4) |  |  |
 Unknown | 20 (4.7) | 9 (5.1) |  |  | 6 (3.5) | 9 (5.2) |  |  |
Grade | Â | Â | 1.452 | 0.484 | Â | Â | 1.356 | 0.508 |
 G1-2 | 111 (26.1) | 38 (21.5) |  |  | 41 (23.8) | 37 (21.5) |  |  |
 G3-4 | 285 (67.2) | 126 (71.2) |  |  | 113 (65.7) | 122 (70.9) |  |  |
 Unknown | 29 (6.8) | 13 (7.3) |  |  | 18 (10.5) | 13 (7.6) |  |  |
T stage (AJCC 7th) | Â | Â | 2.315 | 0.510 | Â | Â | 0.062 | 0.996 |
 T1 | 13 (3.1) | 10 (5.6) |  |  | 10 (5.8) | 9 (5.2) |  |  |
 T2 | 26 (6.1) | 10 (5.6) |  |  | 10 (5.8) | 10 (5.8) |  |  |
 T3 | 244 (57.4) | 100 (56.5) |  |  | 97 (56.4) | 97 (56.4) |  |  |
 T4 | 142 (33.4) | 57 (32.2) |  |  | 55 (32.0) | 56 (32.6) |  |  |
N stage (AJCC 7th) | Â | Â | 4.149 | 0.246 | Â | Â | 2.971 | 0.396 |
 N0 | 86 (20.2) | 25 (14.1) |  |  | 33 (19.2) | 25 (14.5) |  |  |
 N1 | 80 (18.8) | 42 (23.7) |  |  | 30 (17.4) | 41 (23.8) |  |  |
 N2 | 113 (26.6) | 50 (28.2) |  |  | 54 (31.4) | 50 (29.1) |  |  |
 N3 | 146 (34.4) | 60 (33.9) |  |  | 55 (32.0) | 56 (32.6) |  |  |
Stage (AJCC 7th) | Â | Â | 3.840 | 0.147 | Â | Â | 0.528 | 0.768 |
 I | 17 (4.0) | 12 (6.8) |  |  | 11 (6.4) | 11 (6.4) |  |  |
 II | 137 (32.2) | 46 (26.0) |  |  | 52 (30.2) | 46 (26.7) |  |  |
 III | 271 (63.8) | 119 (67.2) |  |  | 109 (63.4) | 115 (66.9) |  |  |
Vascular invasion | Â | Â | 1.899 | 0.168 | Â | Â | 0.134 | 0.714 |
 Yes | 102 (24.0) | 52 (29.4) |  |  | 44 (25.6) | 47 (27.3) |  |  |
 No | 323 (76.0) | 125 (70.6) |  |  | 128 (74.4) | 125 (72.7) |  |  |
Perineural invasion | Â | Â | 0.001 | 0.979 | Â | Â | 0.091 | 0.763 |
 Yes | 70 (16.5) | 29 (16.4) |  |  | 25 (14.5) | 27 (15.7) |  |  |
 No | 355 (83.5) | 148 (83.6) |  |  | 147 (85.5) | 145 (84.3) |  |  |
Tumor deposits | Â | Â | 1.546 | 0.214 | Â | Â | 0.595 | 0.441 |
 Positive | 47 (11.1) | 26 (14.7) |  |  | 27 (15.7) | 22 (12.8) |  |  |
 Negative | 378 (88.9) | 151 (85.3) |  |  | 145 (84.3) | 150 (87.2) |  |  |
Laparotomic approaches | Â | Â | 0.454 | 0.500 | Â | Â | 0.000 | 1.000 |
 Open | 384 (90.4) | 163 (92.1) |  |  | 158 (91.9) | 158 (91.9) |  |  |
 Laporascopy | 41 (9.6) | 14 (7.9) |  |  | 14 (8.1) | 14 (8.1) |  |  |
Scope of gastrectomy | Â | Â | 1.451 | 0.228 | Â | Â | 0.212 | 0.645 |
 Total gastrectomy | 302 (71.1) | 117 (66.1) |  |  | 118 (68.6) | 114 (66.3) |  |  |
 Partial gastrectomy | 123 (28.9) | 60 (33.9) |  |  | 54 (31.4) | 58 (33.7) |  |  |
 Hemoglobin (g/L) [median (IQR)] | 111 (98~121) | 115 (102~123) | 1.647a | 0.100 | 111 (98~120) | 114 (102~123) | 1.565a | 0.118 |
 Albumin (g/L) [median (IQR)] | 38.6 (35.6~41.9) | 39.3 (36.0~42.7) | 1.059a | 0.290 | 38.0 (34.3~41.6) | 39.2 (36.0~42.6) | 1.776a | 0.076 |