Variables | Single Metastasis (n = 9425)c | Multiple Metastases (n = 2460)c | ||
---|---|---|---|---|
HRa (95% CIb) | P value | HR (95% CI) | P value | |
Gender | ||||
Male | Reference | Reference | ||
Female | 0.889 (0.844–0.936) | < 0.001 | 0.869 (0.786–0.961) | 0.006 |
Age (years) | ||||
≤ 65 | Reference | Reference | ||
> 65 | 1.333 (1.267–1.403) | < 0.001 | 1.259 (1.139–1.391) | < 0.001 |
Race | ||||
White | Reference | Reference | ||
Black | 1.058 (0.983–1.140) | 0.132 | 0.984 (0.845–1.145) | 0.834 |
Others | 0.969 (0.879–1.069) | 0.529 | 1.073 (0.895–1.286) | 0.447 |
Tumor location | ||||
Head | Reference | Reference | ||
Body/tail | 1.053 (0.995–1.114) | 0.073 | 1.041 (0.924–1.172) | 0.510 |
Others | 1.076 (1.005–1.152) | 0.036 | 1.045 (0.911–1.199) | 0.530 |
Marital status | ||||
Married | Reference | Reference | ||
Unmarried/unknown | 1.164 (1.104–1.226) | < 0.001 | 1.147 (1.036–1.270) | 0.008 |
Grade | ||||
Well/moderately differentiated | Reference | Reference | ||
Poorly differentiated/undifferentiated | 1.952 (1.757–2.169) | < 0.001 | 1.522 (1.218–1.901) | < 0.001 |
Unknown | 1.781 (1.637–1.937) | < 0.001 | 1.440 (1.201–1.726) | < 0.001 |
Tumor size | 1.001 (1.000–1.002) | 0.156 | 1.000 (0.998–1.001) | 0.490 |
Surgery | ||||
No | Reference | Reference | ||
Yes | 0.460 (0.405–0.522) | < 0.001 | 0.773 (0.551–1.083) | 0.134 |
Chemotherapy | ||||
No | Reference | Reference | ||
Yes | 0.428 (0.406–0.451) | < 0.001 | 0.360 (0.324–0.401) | < 0.001 |
Radiotherapy | ||||
No | Reference | Reference | ||
Yes | 0.819 (0.719–0.932) | 0.003 | 0.799 (0.673–0.948) | 0.010 |