Skip to main content

Table 1 Comparisons of clinicopathological characteristics of patients

From: Effect of prior cancer on survival outcomes for patients with pancreatic adenocarcinoma: a propensity score analysis

Characteristic Before PSM After PSM Effect size
Without prior cancer With prior cancer Total number P value Without prior cancer With prior cancer Total number P value
Total number   8797 438 9235   4380 438 4818   
Age (years) ≤ 60 2683 43 2726 < 0.001 429 43 472 1.000 0.001
>  60 6114 395 6509 3951 395 4346
Gender Female 4201 213 4414 0.732 2138 213 2351 0.960 0.002
Male 4596 225 4821 2242 225 2467
Race Black 1113 48 1161 0.186 519 48 567 0.487 0.020
White 6937 361 7298 3512 361 3873
Others 747 29 776 349 29 378
Tumor site Head 5214 233 5447 0.018 2498 233 2731 0.051 0.241
Body 1135 80 1215 574 80 654
Tail 1143 60 1203 613 60 673
Pancreatic duct 662 33 695 328 33 361
Others 643 32 675 367 32 399
Tumor size (cm) ≤ 2 858 53 911 0.261 442 53 495 0.416 0.019
2~4 4429 218 4647 2240 218 2458
> 4 3510 167 3677 1698 167 1865
Tumor grade Well 915 44 959 0.019 492 44 536 0.432 −0.020
Moderate 3708 191 3899 1884 191 2075
Poor 4024 187 4211 1896 187 2083
Undifferentiated 150 16 166 108 16 124
T stage T0 33 2 35 0.006 25 2 27 0.173 0.159
TI 332 25 357 190 25 215
TII 1848 118 1966 1013 118 1131
TIII 4799 214 5013 2374 214 2588
TIV 1785 79 1864 778 79 857
N stage N0 4464 254 4718 0.012 2462 254 2716 0.735 −0.006
N1 3398 146 3544 1502 146 1648
N2 935 38 973 416 38 454
Metastasis Absent 4728 243 4971 0.492 2402 243 2645 0.801 0.006
Present 4069 195 4264 1978 195 2173
TNM stage I 551 48 559 0.001 358 48 406 0.237 0.172
II 2623 131 2754 1345 131 1476
III 1554 64 1618 699 64 763
IV 4069 195 4264 1978 195 2173
Surgery Performed 3408 161 3569 < 0.001 1610 161 1771 0.103 0.189
Recommended, not performed 245 28 273 185 28 213
Not recommended 5144 249 5393 2585 249 2834
Radiotherapy No 7605 393 7998 0.052 3840 393 4233 0.220 −0.172
Yes 1192 45 1237 540 45 585
Chemotherapy No 3160 180 3340 0.029 1752 180 1932 0.683 0.005
Yes 5637 258 5895 2628 258 2886
  1. LN Lymph node metastasis, TNM Tumor-node-metastasis stage