Table 1 The correlation between clinical parameters and RT use
Clinical parameters | Stage I | Stage II | ||||||
|---|---|---|---|---|---|---|---|---|
No RT | Neoadjuvant RT | adjuvant RT | P | No RT | Neoadjuvant RT | adjuvant RT | P | |
Age | 0.626 | <0.001 | ||||||
< 60 | 471(29.2) | 26(29.5) | 123(31.7) | 1822(22.4) | 193(35.5) | 1297(30.9) | ||
≥ 60 | 1142(70.8) | 62(70.5) | 265(68.3) | 6322(77.6) | 351(64.5) | 2903(69.1) | ||
Year of diagnosis | <0.001 | <0.001 | ||||||
2004–2009 | 737(45.7) | 34(38.6) | 235(60.6) | 3226(39.6) | 158(29.0) | 2101(50.0) | ||
2010–2015 | 876(54.3) | 54(61.4) | 153(39.4) | 4918(60.4) | 386(71.0) | 2099(50.0) | ||
Sex | 0.002 | 0.133 | ||||||
Female | 916(56.8) | 44(50.0) | 183(47.2) | 4038(49.6) | 278(51.1) | 2012(47.9) | ||
Male | 697(43.2) | 44(50.0) | 205(52.8) | 4106(50.4) | 266(48.9) | 2188(52.1) | ||
Race | 0.012 | 0.009 | ||||||
Black | 161(10.0) | 12(13.6) | 58(14.9) | 751(9.2) | 59(10.8) | 394(9.4) | ||
White | 1282(79.5) | 72(81.8) | 300(77.3) | 6773(83.2) | 466(85.7) | 3492(83.1) | ||
Other | 170(10.5) | 4(4.5) | 30(7.7) | 620(7.6) | 19(3.5) | 314(7.5) | ||
Primary tumor Site | <0.001 | <0.001 | ||||||
Head | 880(54.6) | 65(73.9) | 251(64.7) | 6285(77.2) | 461(84.7) | 3314(78.9) | ||
Body | 233(14.4) | 11(12.5) | 56(14.4) | 512(6.3) | 36(6.6) | 270(6.4) | ||
tail | 381(23.6) | 6(6.8) | 54(13.9) | 904(11.1) | 22(4.0) | 398(9.5) | ||
Pancreatic duct | 26(1.6) | 1(1.1) | 7(1.8) | 100(1.2) | 1(0.2) | 44(1.0) | ||
Overlapping | 93(5.8) | 5(5.7) | 20(5.2) | 343(4.2) | 24(4.4) | 174(4.1) | ||
Pathological grade | <0.001 | <0.001 | ||||||
I | 315(19.5) | 12(13.6) | 57(14.7) | 768(9.4) | 42(7.7) | 370(8.8) | ||
II | 608(37.7) | 22(25.0) | 202(52.1) | 3781(46.4) | 166(30.5) | 2094(49.9) | ||
III | 272(16.9) | 18(20.5) | 89(22.9) | 2878(35.3) | 106(19.5) | 1450(34.5) | ||
IV | 29(1.8) | 0(0) | 5(1.3) | 112(1.4) | 8(1.5) | 53(1.3) | ||
Unknown | 389(24.1) | 36(40.9) | 35(9.0) | 605(7.4) | 222(40.8) | 233(5.5) | ||
T | <0.001 | 0.002 | ||||||
1 | 636(39.4) | 20(22.7) | 115(29.6) | 157(1.9) | 2(0.4) | 75(1.8) | ||
2 | 977(60.6) | 68(77.3) | 273(70.4) | 582(7.1) | 23(4.2) | 325(7.7) | ||
3 | – | – | – | 7405(90.9) | 519(95.4) | 3800(90.5) | ||
N | – | <0.001 | ||||||
0 | – | – | – | 2384(29.3) | 256(47.1) | 1025(24.4) | ||
1 | – | – | – | 5760(70.7) | 288(52.9) | 3175(75.6) | ||
Chemotherapy | <0.001 | <0.001 | ||||||
No | 1041(64.5) | 3(3.4) | 28(7.2) | 3656(44.9) | 8(1.5) | 215(5.1) | ||
Yes | 572(35.5) | 85(96.6) | 360(92.8) | 4488(55.1) | 536(98.5) | 3985(94.9) | ||
Surgical procedures | 0.082 | 0.010 | ||||||
Local excision of tumor | 12(0.7) | 1(1,1) | 2(0.5) | 27(0.3) | 5(0.9) | 19(0.5) | ||
Pancreatectomy | 1411(87.5) | 67(76.1) | 341(87.9) | 6916(84.9) | 447(82.2) | 3569(85.0) | ||
Extended | 154(9.5) | 15(17.0) | 34(8.8) | 1097(13.5) | 78(14.3) | 577(13.7) | ||
Unknown | 36(2.2) | 5(5.7) | 11(2.8) | 104(1.3) | 14(2.6) | 35(0.8) | ||