Table II.
Comparison of bone metastasis distribution between breast and prostate carcinomas.
| Few bone metastases
|
Extensive bone metastases
|
|||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Bca (n=151)
|
Pca (n=58)
|
Bca (n=989)
|
Pca (n=1781)
|
|||||||||
| Metastatic position | n | % | n | % | χ2 | P-value | n | % | n | % | χ2 | P-value |
| Vertebrae and pelvis | 63 | 41.7 | 47 | 81.0 | 27.6 | 0.000 | 405 | 41.0 | 866 | 48.6 | 15.1 | 0.000 |
| Thoracic skeleton | 99 | 65.6 | 16 | 27.6 | 24.8 | 0.000 | 498 | 50.4 | 919 | 51.6 | 0.4 | 0.530 |
n, the lesion number of bone metastases; Bca, breast carcinoma; Pca, prostate carcinoma. Vertebrae and pelvis includes the thoracic vertebrae, lumbar vertebrae, sacrococcyx, ilium, ischium and pubis. Thoracic skeleton includes the sternum, collar bone, ribs, scapula and thoracic vertebrae. Chi-square test of likelihood ratio was performed to compare the proportions of metastatic bone lesions in breast and prostate carcinomas.