Table 3.
Patient characteristics in matched groups
| Variables | IDC | PLC | Total | P –valueb | |
|---|---|---|---|---|---|
| N a = 117(%) | N a = 117(%) | N a = 234(%) | |||
| Year of diagnosis | 1990–1999 | 9 (7.7) | 9 (7.7) | 18 (7.7) | 1.000 |
| 2000–2009 | 108 (92.3) | 108 (92.3) | 216 (92.3) | ||
| Age at diagnosis | 15–49 | 21 (17.9) | 21 (17.9) | 42 (17.9) | 1.000 |
| 50–86+ | 96 (82.1) | 96 (82.1) | 192 (82.1) | ||
| Race | White | 91 (77.8) | 91 (77.8) | 182 (77.8) | 1.000 |
| Black | 15 (12.8) | 15 (12.8) | 30 (12.8) | ||
| Otherc | 11 (9.4) | 11 (9.4) | 22 (9.4) | ||
| Marital status | Married | 100 (85.5) | 100 (85.5) | 200 (85.5) | 1.000 |
| Unmarriedd | 10 (8.5) | 10 (8.5) | 10 (8.5) | ||
| Unknown | 7 (6) | 7 (6) | 14 (6) | ||
| Laterality | Right | 61 (52.1) | 61 (52.1) | 122 (52.1) | 1.000 |
| Left | 56 (47.9) | 56 (47.9) | 112 (47.9) | ||
| Grade | I | 1 (0.9) | 1 (0.9) | 2 (0.9) | 1.000 |
| II | 37 (31.6) | 37 (31.6) | 74 (31.6) | ||
| III | 53 (45.3) | 53 (45.3) | 106 (45.3) | ||
| Unknown | 26 (22.2) | 22 (22.2) | 44 (22.2) | ||
| AJCC stage | I | 34 (29.1) | 34 (29.1) | 68 (29.1) | 1.000 |
| II | 53 (45.3) | 53 (45.3) | 106 (45.3) | ||
| III | 21 (17.9) | 21 (17.9) | 42 (17.9) | ||
| IV | 3 (2.6) | 3 (2.6) | 6 (2.6) | ||
| II | 6 (5.1) | 6 (5.1) | 12 (45.1) | ||
| LN status | III | 49 (41.9) | 49 (41.9) | 98 (41.9) | 1.000 |
| Negative | 57 (48.7) | 57 (48.7) | 114 (48.7) | ||
| Unknown | 11 (9.4) | 11 (9.4) | 22 (9.4) | ||
| ER status | Positive | 74 (63.2) | 74 (63.2) | 148 (63.2) | 1.000 |
| Negative | 30 (25.6) | 30 (25.6) | 60 (25.6) | ||
| Unknown | 13 (11.1) | 13 (11.1) | 26 (11.1) | ||
| PR status | Positive | 63 (53.8) | 63 (53.8) | 126 (53.8) | 1.000 |
| Negative | 40 (34.2) | 40 (4.2) | 80 (34.2) | ||
| Unknown | 14 (12) | 14 (12) | 28 (12) | ||
| Surgery type | Mastectomy | 67 (57.3) | 67 (57.3) | 134 (57.3) | 1.000 |
| Lumpectomy | 40 (34.2) | 40 (34.2) | 80 (34.2) | ||
| No surgery | 4 (3.4) | 4 (3.4) | 8 (3.4) | ||
| Unknown | 6 (5.1) | 6 (5.1) | 12 (5.1) | ||
| Radiation | Yes | 111 (94.9) | 111 (94.9) | 122 (94.9) | 1.000 |
| No | 6 (5.1) | 6 (5.1) | 12 (5.1) | ||
AJCC, American Joint Committee on Cancer; ER, estrogen receptor; PLC, Pleomorphic lobular breast carcinoma; IDC, infiltrating ductal carcinoma; LN, lymph node, PR, progesterone receptor.
a
The data are presented as the No. (percentage) of patients unless otherwise indicated.
b
P‐value of the Chi‐square test to compare the PLC and IDC groups.
c
Including American Indian/Alaskan native, Asian/Pacific Islander and others‐unspecified.
d
Including divorced, separated, single (never married) and widowed.