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. 2022 Sep 23;20:304. doi: 10.1186/s12957-022-02773-1

Table 1.

Comparison of clinicopathologic features between TD-absent and TD-present gastric cancer patients before and after PSM

Variables Before PSM After PSM
TD-absent TD-present P value SMD TD-absent TD-present P value SMD
n % n % n % n %
Overall 1714 201 491 191
Sex
 Male 1184 69.1 149 74.1 0.164 0.112 355 72.3 140 73.3 0.868 0.022
 Female 530 30.9 52 25.9 136 27.7 51 26.7
Age (years)
 < 58 917 53.5 78 38.8 < 0.001 0.298 205 41.8 77 40.3 0.798 0.029
 ≥ 58 797 46.5 123 61.2 286 58.2 114 59.7
 Mean (SD) 56.9 ± 11.1 61.0 ± 10.6 59.9 ± 10.6 60.7 ± 10.6
 Median (range) 58 (19–82) 62 (33–84) 61 (28–82) 62 (33–84)
Tumor location
 GEJ + Upper 1/3 431 25.1 68 33.8 0.013 0.217 163 33.2 65 34.0 0.964 0.023
 Middle 1/3 417 24.3 51 25.4 122 24.8 48 25.1
 Lower 1/3 866 50.5 82 40.8 206 42.0 78 40.8
Tumor size
 <3.2 cm 922 53.8 45 22.4 < 0.001 0.683 145 29.5 45 23.6 0.142 0.136
 ≥ 3.2 cm 792 46.2 156 77.6 346 70.5 146 76.4
 Mean (SD) 3.6 ± 2.1 5.1 ± 2.3 4.7 ± 2.3 4.9 ± 2.1
 Median (range) 3.0 (0.3–16.0) 4.5 (0.8–14.0) 4.5 (0.5–14) 6.0 (0.8–12)
Histologic grade
 Well-moderately 325 19.0 29 14.4 0.141 0.122 68 13.8 28 14.7 0.880 0.023
 Poorly 1389 81.0 172 85.6 423 86.2 163 85.3
T category
 T1 521 30.4 2 1.0 < 0.001 1.131 6 1.2 2 1.0 0.508 0.148
 T2 255 14.9 11 5.5 35 7.1 11 5.8
 T3 187 10.9 14 7.0 42 8.6 14 7.3
 T4a 731 42.6 158 78.6 393 80.0 153 80.1
 T4b 20 1.2 16 8.0 15 3.1 11 5.8
N category
 N0 790 46.1 16 8.0 < 0.001 1.023 50 10.2 16 8.4 0.846 0.100
 N1 308 18.0 36 17.9 97 19.8 36 18.8
 N2 280 16.3 50 24.9 132 26.9 49 25.7
 N3a 259 15.1 74 36.8 164 33.4 67 35.1
 N3b 77 4.5 25 12.4
TNM stage
 I 620 36.2 3 1.5 < 0.001 1.209 16 3.3 3 1.6 0.365 0.128
 II 398 23.2 22 10.9 66 13.4 22 11.5
 III 696 40.6 176 87.6 409 83.3 166 86.9
VELIPI
 Negative 996 58.1 54 26.9 < 0.001 0.666 147 29.9 54 28.3 0.738 0.037
 Positive 718 41.9 147 73.1 344 70.1 137 71.7
No. of retrieved LNs
 < 15 331 19.3 36 17.9 0.702 0.036 86 17.5 33 17.3 1.000 0.006
 ≥ 15 1383 80.7 165 82.1 405 82.5 158 82.7
 Mean (SD) 21.3 ± 8.4 21.9 ± 8.4 21.9 ± 8.3 22.0 ± 8.5
 Median (range) 20 (2–74) 20 (8–62) 20 (5–55) 20 (8–62)
Adjuvant treatment
 No 501 29.2 38 18.9 < 0.001 0.388 66 13.4 32 16.8 0.812 0.106
 Single drug 304 17.7 40 19.9 104 21.2 38 19.9
 Double drugs 625 36.5 63 31.3 177 36.0 63 33.0
 Triple drugs 167 9.7 43 21.4 101 20.6 41 21.5
 CRT 117 6.8 17 8.5 43 8.8 17 8.9

Abbreviations: CI confidence interval, GEJ gastroesophageal junction, LNs lymph nodes, PSM propensity score matching, SD standard difference, SMD standardized mean difference, TD tumor deposit, VELIPI vascular emboli, lymphatic, and perineural invasion