Figure 2.

Comparison of rib metastases between breast and prostate carcinomas. The results show that with an increase in the number of metastatic bone lesions, the proportion of metastatic rib lesions of prostate carcinoma gradually increased (χ²=39.1, P=0.000), but that of breast carcinoma did not change (χ²=0.2, P=0.903). In the few bone metastases group, the proportion of metastatic rib lesions of prostate carcinoma was markedly lower than that of breast carcinoma (8.6 vs. 27.2%, χ²=9.6, P=0.002), but in the extensive bone metastases group, it was similar to that of breast carcinoma (30.9 vs. 27.2%, χ²=4.3, P=0.038).