Table 1. Comparison of total distribution of bone metastases (n = 4279) between pulmonary and prostate cancers.
| Skeleton | Pulmonary cancer (n = 2279) | Prostate cancer (n = 2000) | χ 2 | p value | ||
|---|---|---|---|---|---|---|
| n | % | n | % | |||
| Vertebrae | 633 | 27.78 | 516 | 25.80 | 2.119 | 0.146 |
| Pelvis | 496 | 21.76 | 572 | 28.60 | 26.537 | 0.000 |
| Thoracic bones | 906 | 39.75 | 702 | 35.10 | 9.852 | 0.002 |
| Skull | 81 | 3.55 | 65 | 3.25 | 0.300 | 0.584 |
| Extremities | 163 | 7.15 | 145 | 7.25 | 0.015 | 0.902 |
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.