Table 1 Baseline characteristics
PR + | PR- | ||||
|---|---|---|---|---|---|
N | % | N | % | P | |
PR | |||||
Positive | 123,751 | 100.0 | 0 | 0.0 | |
Negative | 0 | 0.0 | 12,769 | 100.0 | |
Age | < 0.001 | ||||
< 50 years | 27,107 | 20.8 | 1155 | 8.6 | |
50 years or older | 103,242 | 79.2 | 12,324 | 91.4 | |
Race | < 0.001 | ||||
Non-Hispanic White | 106,157 | 81.4 | 10,744 | 79.7 | |
Hispanic White | 7437 | 5.7 | 734 | 5.4 | |
Black | 9686 | 7.4 | 1352 | 10.0 | |
Asian/Pacific Islander | 4946 | 3.8 | 447 | 3.3 | |
Other | 1064 | 0.8 | 96 | 0.7 | |
Not available | 1059 | 0.8 | 106 | 0.8 | |
Facility | < 0.001 | ||||
Nonacademic | 82,586 | 63.4 | 8612 | 63.9 | |
Academic | 44,100 | 33.8 | 4643 | 34.4 | |
Not available | 3663 | 2.8 | 224 | 1.7 | |
Insurance | < 0.001 | ||||
None | 1551 | 1.2 | 179 | 1.3 | |
Private | 79,056 | 60.6 | 7181 | 53.3 | |
Government | 48,434 | 37.2 | 5993 | 44.5 | |
Not available | 1308 | 1.0 | 126 | 0.9 | |
Income | 0.01 | ||||
Above median | 75,920 | 58.2 | 7802 | 57.9 | |
Below median | 35,120 | 26.9 | 3767 | 27.9 | |
Not available | 19,309 | 14.8 | 1910 | 14.2 | |
Education | < 0.001 | ||||
Above median | 70,707 | 54.2 | 7175 | 53.2 | |
Below median | 40,507 | 31.1 | 4415 | 32.8 | |
Not available | 19,135 | 14.7 | 1889 | 14.0 | |
CDS | < 0.001 | ||||
0 | 110,215 | 84.6 | 11,207 | 83.1 | |
1 | 16,208 | 12.4 | 1824 | 13.5 | |
2 + | 3926 | 3.0 | 448 | 3.3 | |
Year | 0.001 | ||||
Median | 2014 | 2014 | |||
IQR | 2012–2016 | 2012–2016 | |||
Histology | < 0.001 | ||||
Ductal or lobular carcinoma | 111,903 | 85.8 | 11,764 | 87.3 | |
Other | 18,446 | 14.2 | 1715 | 12.7 | |
T staging | < 0.001 | ||||
1 | 97,532 | 74.8 | 9631 | 71.5 | |
2 | 31,013 | 23.8 | 3621 | 26.9 | |
3 | 1804 | 1.4 | 227 | 1.7 | |
N staging | < 0.001 | ||||
0 | 110,421 | 84.7 | 11,897 | 88.3 | |
1a | 19,928 | 15.3 | 1582 | 11.7 | |
Grade | < 0.001 | ||||
1 | 37,224 | 28.6 | 2871 | 21.3 | |
2 | 70,043 | 53.7 | 6533 | 48.5 | |
3 | 18,379 | 14.1 | 3563 | 26.4 | |
Other | 58 | 0.0 | 21 | 0.2 | |
Not available | 4645 | 3.6 | 491 | 3.6 | |
RS | < 0.001 | ||||
0–15 | 68,683 | 52.7 | 1925 | 14.3 | |
16–25 | 46,723 | 35.8 | 5394 | 40.0 | |
> 25 | 14,943 | 11.5 | 6160 | 45.7 | |
LVSI | < 0.001 | ||||
No | 99,783 | 76.6 | 10,446 | 77.5 | |
Yes | 16,081 | 12.3 | 1526 | 11.3 | |
Not available | 14,485 | 11.1 | 1507 | 11.2 | |
Chemotherapy | < 0.001 | ||||
No | 105,902 | 81.2 | 7435 | 55.2 | |
Yes | 24,447 | 18.8 | 6044 | 44.8 | |
Radiation | 0.36 | ||||
No | 40,291 | 30.9 | 4243 | 31.5 | |
Yes | 88,630 | 68.0 | 9094 | 67.5 | |
Not available | 1428 | 1.1 | 142 | 1.1 | |
Surgery | 0.56 | ||||
Lumpectomy | 88,283 | 67.7 | 9161 | 68.0 | |
Mastectomy | 42,039 | 32.3 | 4314 | 32.0 | |
Other | 27 | 0.0 | 4 | 0.0 | |
Margin | 0.02 | ||||
Negative | 126,053 | 96.7 | 12,990 | 96.4 | |
Positive | 3856 | 3.0 | 451 | 3.3 | |
Not available | 440 | 0.3 | 38 | 0.3 | |