Table 2. Comparison of bone metastases between pulmonary and prostate cancers in patients with few bone metastases (n = 304).
| Skeleton | Pulmonary cancer (n = 246) | Prostate cancer (n = 58) | χ 2 | p value | ||
|---|---|---|---|---|---|---|
| n | % | n | % | |||
| Vertebrae | 71 | 28.86 | 35 | 60.34 | 15.958 | 0.000 |
| Pelvis | 47 | 19.11 | 14 | 24.14 | 0.715 | 0.398 |
| Thoracic bones | 97 | 39.43 | 6 | 10.34 | 20.736 | 0.000 |
| Skull | 6 | 2.44 | 0 | 0.00 | - | - |
| Extremities | 25 | 10.16 | 3 | 5.17 | 1.584 | 0.208 |
Note: n, the lesion number of bone metastases. Chi-square test of likelihood ratio was performed to compare the different proportions of bone metastases between pulmonary and prostate cancers.