Adjuvant chemotherapy for isolated resectable colorectal lung metastasis: A retrospective study using inverse probability treatment weighting propensity analysis

Table 4 Multivariate analysis of overall survival after inverse probability of treatment-weighting

Survival		HR	95%CI	P value
Adjuvant chemotherapy	No
	Yes	0.43	0.16-1.18	0.10
Number of metastatic lesions	1
	≥ 2	1.95	0.64-5.93	0.24
Prior extra-thoracic metastasis	No
	Yes	4.97	1.03-24.08	0.046
Bilateral pulmonary nodules	No
	Yes	1.84	0.36-9.43	0.47
CEA	≤ 5 ng/mL
	> 5 ng/mL	2.00	0.76-5.28	0.16
Type of resection	Lobectomy
	Sublobar resection	0.53	0.21-1.35	0.19

HR: Hazard ratio; CEA: Carcinoembryonic antigen; CI: Confidence interval.