Table 2.
The number and proportion of breast cancer patients with single metastatic site and multiple metastatic sites.
| Age < 50 years | 50–69 years | Age > 69 years | Total | P-value | |||||
|---|---|---|---|---|---|---|---|---|---|
| No. | % | No. | % | No. | % | No. | % | ||
| Bone only | 307 | 36.1% | 868 | 34.2% | 581 | 37.7% | 1,756 | 35.6% | 0.072 |
| Lung only | 50 | 5.9% | 192 | 7.6% | 219 | 14.2% | 461 | 9.3% | <0.001 |
| Liver only | 69 | 8.1% | 160 | 6.3% | 88 | 5.7% | 317 | 6.4% | 0.066 |
| Brain only | 16 | 1.9% | 46 | 1.8% | 24 | 1.6% | 86 | 1.7% | 0.787 |
| Distant lymph nodes only | 62 | 7.3% | 136 | 5.4% | 63 | 4.0% | 261 | 5.3% | 0.004 |
| Multiple sites | 297 | 34.9% | 920 | 36.2% | 436 | 28.3% | 1,653 | 33.5% | <0.001 |