Table 1 Clinical features of the included patients with PDA
Variable | Before PSM | After PSM | ||||
|---|---|---|---|---|---|---|
None (n = 3770) | PTR (n = 552) | P value | None (n = 720) | PTR (n = 240) | P value | |
Age (years) | 66.7 ± 11.3 | 64.6 ± 10.5 | < 0.001 | 67.4 ± 11.1 | 67.2 ± 10.2 | 0.777 |
Sex | 0.510 | 0.911 | ||||
Female | 1887 (50.1%) | 268 (48.6%) | 361 (50.1%) | 122 (50.8%) | ||
Male | 1883 (49.9%) | 284 (51.4%) | 359 (49.9%) | 118 (49.2%) | ||
Race | 0.528 | 0.161 | ||||
White | 2968 (78.7%) | 445 (80.6%) | 563 (78.2%) | 197 (82.1%) | ||
Black | 463 (12.3%) | 59 (10.7%) | 93 (12.9%) | 20 (8.3%) | ||
Other | 339 (9.0%) | 48 (8.7%) | 64 (8.9%) | 23 (9.6%) | ||
Primary tumor site in pancreas | < 0.001 | 0.463 | ||||
Head | 2672 (70.9%) | 438 (79.3%) | 501 (69.6%) | 173 (72.1%) | ||
Body and tail | 1080 (28.6%) | 116 (19.2%) | 219 (30.4%) | 67 (27.9%) | ||
Tumor size (mm) | 41.0 ± 15.4 | 38.5 ± 16.3 | < 0.001 | 44.9 ± 16.7 | 45.6 ± 18.6 | 0.558 |
Tumor differentiation | < 0.001 | 0.197 | ||||
I | 178 (4.7%) | 52 (9.4%) | 57 (7.9%) | 17 (7.1%) | ||
II | 402 (10.7%) | 223 (40.4%) | 153 (21.2%) | 56 (23.3%) | ||
III | 421 (11.2%) | 163 (29.5%) | 168 (23.3%) | 53 (22.1%) | ||
IV | 26 (0.7%) | 3 (0.5%) | 1 (0.1%) | 3 (1.2%) | ||
Chemotherapy | 0.272 | 0.228 | ||||
No/unknown | 2960 (78.5%) | 422 (76.4%) | 608 (84.4%) | 194 (80.8%) | ||
Yes | 810 (21.5%) | 130 (23.6%) | 112 (15.6%) | 46 (19.2%) | ||