Comparison of survival of patients with metastases from known versus unknown primaries: survival in metastatic cancer

Table 1 Risks of death for metastatic cancers compared to CUP (cancer of unknown primary) patients diagnosed with these metastases

Primary site	N	HR	95% CI
CUP (reference)	2881	1
Colorectal cancer	1438	0.61	0.57	0.65
Pancreatic cancer	460	1.71	1.54	1.90
Stomach cancer	322	1.16	1.02	1.31
Liver cancer	188	1.58	1.36	1.84
Lung cancer	2453	0.98	0.92	1.04
Kidney cancer	284	0.71	0.62	0.80
Bladder cancer	139	0.93	0.78	1.11
Prostate cancer	1259	0.24	0.22	0.26
Breast cancer	202	0.53	0.45	0.61
All known primaries	6745	0.69	0.66	0.72

Patients were diagnosed and died between 2002 and 2008. Only patients with one primary cancer and a positive metastasis status were considered.

ISSN: 1471-2407