Table 5.

Survival of the pulmonary metastasectomy from CRC in multivariate analysis

Prognostic factors	p value	Risk ratio	95% confidence interval
Gender (male/female)	0.60	1.324	0.484–4.381
Past history of extra thoracic metastasis (presence/absence)	0.67	1.205	0.511–2.922
Preoperative CEA level (elevated/normal)	0.89	1.083	0.356–3.547
Maximum tumor size (≧ 20 mm/< 20 mm)	0.74	1.203	0.401–3.646
Mediastinal lymph node metastasis (positive/negative)	0.02*	8.206	1.566–34.962
Repeat pulmonary metastasectomy for the pulmonary recurrence (yes/no)	< 0.001***	0.054	0.010–0.202

CRC colorectal cancer, CEA carcinoembryonic antigen level, normal upper limit at 5 ng/ml

^*p < 0.05; ^**p < 0.01; ^***p < 0.001