Table 1.
Clinical and pathological characteristics among 17,481 invasive breast cancers of lobular or ductal histology from a population-based cohort from western and southeast Sweden.
| Lobular | Ductal | Total | P valuea | |
|---|---|---|---|---|
| Total no. of patients (%) | 2898 | 14,583 | 17,481 | |
| Age | ||||
| < 50 | 583 (20.1) | 3788 (26.0) | 4371 (25.0) | <0.001 |
| 50–74 | 2315 (79.9) | 10,795 (74.0) | 13,110 (75.0) | |
| ER | ||||
| Neg. | 201 (8.7) | 2719 (22.7) | 2920 (20.4) | <0.001 |
| Pos. | 2117 (91.3) | 9263 (77.3) | 11,380 (79.6) | |
| Unknown | 580 | 2601 | 3181 | |
| PR | ||||
| Neg. | 573 (24.8) | 4307 (36.1) | 4880 (34.3) | <0.001 |
| Pos. | 1734 (75.2) | 7636 (63.9) | 9370 (65.7) | |
| Unknown | 591 | 2640 | 3231 | |
| Type of surgery | ||||
| Breast conserving | 1359 (47.1) | 8080 (55.6) | 9439 (54.2) | <0.001 |
| Mastectomy | 1524 (52.9) | 6444 (44.4) | 7968 (45.8) | |
| Unknown | 15 | 59 | 74 | |
| Tumour size (mm) | ||||
| ≤ 10 | 500 (17.8) | 3434 (24.1) | 3934 (23.1) | <0.001 |
| 11–20 | 1196 (42.5) | 6199 (43.5) | 7395 (43.3) | |
| > 20 | 1118 (39.7) | 4623 (32.4) | 5741 (33.6) | |
| Unknown | 84 | 327 | 411 | |
| Node status | ||||
| 0 | 1856 (64.0) | 9560 (65.6) | 11,416 (65.3) | <0.001 |
| 1–3 | 619 (21.4) | 3275 (22.5) | 3894 (22.3) | |
| >3 | 423 (14.6) | 1748 (12.0) | 2171 (12.4) | |
| NHG | ||||
| 1 | 362 (20.2) | 2185 (27.0) | 2547 (25.8) | <0.001 |
| 2 | 1295 (72.4) | 3366 (41.5) | 4661 (47.1) | |
| 3 | 133 (7.4) | 2552 (31.5) | 2685 (27.1) | |
a
Pearson chi-squared test.