Table V.

Comparison of patient characteristics between primary lung cancer and metastasis from breast cancer.

	Primary lung cancer			Metastasis from breast cancer
Patient characteristics	N	Range	%	N	Range	%	P-value
No. of patients	20			7
Age (years)	62	41–77		54	41–58		0.121
Nodule diameter (mm)	13	7–22		10	6–22		0.237
DFI (months)	94	6–229		41	12–88		0.031
Pre-operative follow-up period (months)	11	1–84		5	1–12		0.232
Smoker	1		5	1		14	0.459
Ipsilaterality	10		50	4		57	0.765
Stage of breast cancer
T
T1, 2	18		90	6		86	0.610
T3	2		10	1		14
N
N0	10		50	2		29	0.298
N1, 2	10		50	5		71

DFI, disease-free interval.