Lymph node ratio as a prognostic factor in patients with pathological N2 non-small cell lung cancer

Table 1 Characteristics of patients with pathological N2 disease

Variables		Number of patients	%
Age (years), range		36–89
Age (years), range	Mean	64.6
Gender
	Male	127	69.8
	Female	55	30.2
Histology
	Adenocarcinoma	120	65.9
	Squamous cell carcinoma	50	27.5
	Others	12	6.6
Clinical T and N status
	T1 N0	49	26.9
	T2 N0	51	28.0
	T3 N0	3	1.7
	T4 N0	2	1.1
	T1 N1	5	2.8
	T2 N1	11	6.0
	T3 N1	3	1.6
	T1 N2	21	11.5
	T2 N2	25	13.8
	T3 N2	12	6.6
Clinical node (cN) factor
	cN0	105	57.7
	cN1	19	10.4
	cN2	58	31.9
Pathological tumor (pT) factor
	pT1	59	32.4
	pT2	92	50.6
	pT3	31	17.0
Side
	Right	101	55.5
	Left	81	44.5
Number of metastatic stations
	Single	56	30.8
	Multiple	126	69.2
Skip N2
	Skip	69	37.9
	Non-skip	113	62.1
Operative procedure
	Pneumonectomy	15	8.3
	Bilobectomy	19	10.4
	Lobectomy	148	81.3
Adjuvant chemotherapy
	Yes	140	76.9
	No	42	23.1

ISSN: 1477-7819