Table 1.
Comparison of baseline characteristics between the high-PMTR region and low-PMTR region, stratified by HSA PTR rate
| Left-sided, n = 29,402 | Right-sided, n = 20,931 | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| High PTR | Low PTR | p | High PTR | Low PTR | p | |||||
| High PMTR | Low PMTR | High PMTR | Low PMTR | High PMTR | Low PMTR | High PMTR | Low PMTR | |||
| Sex = Female | 1181 (38.7) | 4910 (41.6) | 4846 (41.7) | 1219 (42.0) | 0.017 | 1102 (50.6) | 4220 (51.2) | 4469 (52.7) | 1027 (50.7) | 0.1 |
| Age, years | < 0.001 | 0.001 | ||||||||
| < 50 | 622 (20.4) | 2283 (19.3) | 2191 (18.8) | 504 (17.3) | 268 (12.3) | 1006 (12.2) | 998 (11.8) | 210 (10.4) | ||
| 50–59 | 830 (27.2) | 3104 (26.3) | 2949 (25.3) | 715 (24.6) | 490 (22.5) | 1631 (19.8) | 1767 (20.8) | 394 (19.5) | ||
| 60–69 | 812 (26.6) | 3080 (26.1) | 3046 (26.2) | 738 (25.4) | 597 (27.4) | 2085 (25.3) | 2099 (24.8) | 528 (26.1) | ||
| 70–79 | 529 (17.3) | 2031 (17.2) | 2108 (18.1) | 550 (18.9) | 475 (21.8) | 1912 (23.2) | 1963 (23.1) | 488 (24.1) | ||
| ≥ 80 | 261 (8.5) | 1311 (11.1) | 1340 (11.5) | 398 (13.7) | 350 (16.1) | 1612 (19.5) | 1653 (19.5) | 405 (20.0) | ||
| Race | < 0.001 | < 0.001 | ||||||||
| Non-Hispanic White | 2237 (73.2) | 6486 (54.9) | 8058 (69.3) | 2096 (72.2) | 1583 (72.6) | 4820 (58.5) | 5890 (69.5) | 1506 (74.4) | ||
| Non-Hispanic Black | 401 (13.1) | 1381 (11.7) | 1779 (15.3) | 179 (6.2) | 379 (17.4) | 1240 (15.0) | 1719 (20.3) | 168 (8.3) | ||
| H ispanic | 254 (8.3) | 2267 (19.2) | 647 (5.6) | 465 (16.0) | 145 (6.7) | 1359 (16.5) | 383 (4.5) | 267 (13.2) | ||
| Other | 162 (5.3) | 1675 (14.2) | 1150 (9.9) | 165 (5.7) | 73 (3.3) | 827 (10.0) | 488 (5.8) | 84 (4.1) | ||
| Marital status | < 0.001 | 0.014 | ||||||||
| Widowed | 343 (11.2) | 1237 (10.5) | 1424 (12.2) | 388 (13.4) | 376 (17.2) | 1325 (16.1) | 1510 (17.8) | 331 (16.3) | ||
| Married | 1605 (52.6) | 6155 (52.1) | 5904 (50.7) | 1504 (51.8) | 1136 (52.1) | 4225 (51.2) | 4257 (50.2) | 1079 (53.3) | ||
| Other | 1106 (36.2) | 4417 (37.4) | 4306 (37.0) | 1013 (34.9) | 668 (30.6) | 2696 (32.7) | 2713 (32.0) | 615 (30.4) | ||
| Year of diagnosis | 0.825 | 0.144 | ||||||||
| 2005–2007 | 803 (26.3) | 3144 (26.6) | 3048 (26.2) | 761 (26.2) | 568 (26.1) | 2287 (27.7) | 2300 (27.1) | 529 (26.1) | ||
| 2008–2010 | 798 (26.1) | 3142 (26.6) | 3059 (26.3) | 796 (27.4) | 580 (26.6) | 2308 (28.0) | 2295 (27.1) | 572 (28.2) | ||
| 2011–2015 | 1453 (47.6) | 5523 (46.8) | 5527 (47.5) | 1348 (46.4) | 1032 (47.3) | 3651 (44.3) | 3885 (45.8) | 924 (45.6) | ||
| Tumor size, cm | < 0.001 | < 0.001 | ||||||||
| < 2 | 69 (2.3) | 248 (2.1) | 226 (1.9) | 66 (2.3) | 41 (1.9) | 151 (1.8) | 137 (1.6) | 42 (2.1) | ||
| ≥ 2, < 4 | 453 (14.8) | 1719 (14.6) | 1672 (14.4) | 374 (12.9) | 330 (15.1) | 1217 (14.8) | 1237 (14.6) | 269 (13.3) | ||
| ≥ 4, < 6 | 852 (27.9) | 3197 (27.1) | 3078 (26.5) | 707 (24.3) | 621 (28.5) | 2254 (27.3) | 2311 (27.3) | 523 (25.8) | ||
| ≥ 6 | 762 (25.0) | 2829 (24.0) | 2866 (24.6) | 636 (21.9) | 683 (31.3) | 2601 (31.5) | 2606 (30.7) | 583 (28.8) | ||
| Unknown | 918 (30.1) | 3816 (32.3) | 3792 (32.6) | 1122 (38.6) | 505 (23.2) | 2023 (24.5) | 2189 (25.8) | 608 (30.0) | ||
| Tumor grade | < 0.001 | < 0.001 | ||||||||
| Grade1/2 | 1946 (63.7) | 7374 (62.4) | 7215 (62.0) | 1816 (62.5) | 1164 (53.4) | 4529 (54.9) | 4513 (53.2) | 1067 (52.7) | ||
| Grade3/4 | 590 (19.3) | 2347 (19.9) | 2088 (17.9) | 544 (18.7) | 695 (31.9) | 2448 (29.7) | 2472 (29.2) | 601 (29.7) | ||
| Unknown | 518 (17.0) | 2088 (17.7) | 2331 (20.0) | 545 (18.8) | 321 (14.7) | 1269 (15.4) | 1495 (17.6) | 357 (17.6) | ||
| T stage | < 0.001 | < 0.001 | ||||||||
| Tis | 5 (0.2) | 21 (0.2) | 21 (0.2) | 3 (0.1) | 2 (0.1) | 13 (0.2) | 11 (0.1) | 7 (0.3) | ||
| T1 | 247 (8.1) | 1250 (10.6) | 1039 (8.9) | 305 (10.5) | 151 (6.9) | 591 (7.2) | 542 (6.4) | 154 (7.6) | ||
| T2 | 70 (2.3) | 271 (2.3) | 300 (2.6) | 60 (2.1) | 31 (1.4) | 152 (1.8) | 158 (1.9) | 33 (1.6) | ||
| T3 | 1340 (43.9) | 4632 (39.2) | 4596 (39.5) | 1107 (38.1) | 843 (38.7) | 3116 (37.8) | 3111 (36.7) | 712 (35.2) | ||
| T4 | 759 (24.9) | 2778 (23.5) | 2871 (24.7) | 661 (22.8) | 794 (36.4) | 2794 (33.9) | 2940 (34.7) | 680 (33.6) | ||
| Unknown | 633 (20.7) | 2857 (24.2) | 2807 (24.1) | 769 (26.5) | 359 (16.5) | 1580 (19.2) | 1718 (20.3) | 439 (21.7) | ||
| N stage | < 0.001 | 0.015 | ||||||||
| N0 | 952 (31.2) | 3748 (31.7) | 3652 (31.4) | 907 (31.2) | 539 (24.7) | 2175 (26.4) | 2119 (25.0) | 537 (26.5) | ||
| N1 | 896 (29.3) | 3608 (30.6) | 3682 (31.6) | 914 (31.5) | 622 (28.5) | 2362 (28.6) | 2540 (30.0) | 581 (28.7) | ||
| N2 | 841 (27.5) | 2835 (24.0) | 2839 (24.4) | 618 (21.3) | 809 (37.1) | 2801 (34.0) | 2914 (34.4) | 662 (32.7) | ||
| Unknown | 365 (12.0) | 1618 (13.7) | 1461 (12.6) | 466 (16.0) | 210 (9.6) | 908 (11.0) | 907 (10.7) | 245 (12.1) | ||
P < 0.05 indicates a significant difference between the groups
HSA, health service area; PMTR, primary tumor resection plus metastasectomy; PTR, primary tumor resection