Table IV.

Clinicopathological features and survival in lung squamous cell carcinoma patients.

Variable	No. of patients (%)	P-value	Hazard ratio	95% confidence interval
Age at surgery (years)
<68	53 (51.5)	0.131	1.502	0.885–2.548
≥68	50 (48.5)
Gender
Male	97 (94.2)	0.904	0.939	0.339–2.602
Female	6 (5.8)
Tumor size (mm)
≤30	39 (37.9)	0.031	1.897	1.059–3.396
>30	64 (62.1)
Lymph node metastasis
n(−)	70 (68.0)	<0.001	3.028	1.785–5.136
n(+)	33 (32.0)
Lymphatic invasion
ly(0, 1)	84 (81.6)	<0.001	3.298	1.827–5.952
ly(2, 3)	19 (18.4)
Venous invasion
v(−)	53 (51.5)	0.145	1.486	0.873–2.530
v(+)	50 (48.5)
Histological differentiation
Well, moderate	90 (87.4)	0.036	2.092	1.050–4.168
Poor	13 (12.6)
Stromal type
Medullary, intermediate	70 (68.0)	0.465	1.229	0.706–2.139
Scirrhous	33 (32.0)
Infiltrating pattern
INFc(−)	64 (62.1)	0.003	2.209	1.301–3.749
INFc(+)	39 (37.9)
Budding
Bud(−)	49 (47.6)	<0.001	3.276	1.841–5.827
Bud(+)	54 (52.4)

n(−)/n(+), lymph node metastasis-negative/positive; INFc(−)/INFc(+), INFc component-negative/positive; Bud(−)/Bud(+), budding-negative/positive.