Table III.

Clinicopathological features and survival in patients with lung squamous cell carcinoma.

Variable	No. of patients (%)	P-value	Hazard ratio	95% Confidence interval
Age at surgery (years)		0.131
<68	53 (51.5)		1.502	0.885–2.548
≥68	50 (48.5)
Gender		0.904
Male	97 (94.2)		0.939	0.339–2.602
Female	6 (5.8)
Tumor size (mm)		0.031
≤30	39 (37.9)		1.897	1.059–3.396
>30	64 (62.1)
Lymph node metastasis		<0.001
n(−)	70 (68.0)		3.028	1.785–5.136
n(+)	33 (32.0)
Lymphatic invasion		<0.001
ly0	43 (41.7)		1.854	1.390–2.474
ly1-3	60 (58.3)
Lymphatic invasion		<0.001
ly0-1	84 (91.6)		3.298	1.827–5.952
ly2-3	19 (18.4)
Venous invasion		0.145
v(−)	53 (51.5)		1.486	0.873–2.530
v(+)	50 (48.5)
Histological differentiation		0.036
Well, mod	90 (87.4)		2.092	1.050–4.168
Poorly	13 (12.6)
Stromal type		0.465
Medullary, intermediate	70 (68.0)		1.229	0.706–2.139
Scirrhous	33 (32.0)
Infiltrating pattern		0.003
INFc(−)	64 (62.1)		2.209	1.301–3.749
INFc(+)	39 (37.9)

n(−)/n(+), lymph node metastasis negative/positive; v(−)/v(+), venous invasion negative/positive; INFc(−)/INFc(+), infiltrating component negative/positive.