Table 3. The expression of PSMD14 was correlated with clinicopathological features in NSCLC patients.

Clinicopathological features	Cases	PSMD14 expression		χ2	P value
		High	Low
Histological subtype				2.597	0.107
SCC	90	54	36
Adenocarcinoma	94	67	27
Age				2.132	0.144
≤50	77	46	31
>50	107	75	32
Gender				1.142	0.285
Male	128	81	47
Female	56	40	16
Tobacco smoking history				1.209	0.271
No	52	31	21
Yes	132	90	42
Tumor size (cm)				0.000	0.988
≤4	105	58	47
>4	79	50	29
Lymph node metastasis				1.615	0.027*
No	111	66	45
Yes	73	55	18
TNM stage				7.928	0.019*
I	65	36	29
II	61	39	22
III + IV	58	46	12
Differentiation degree				3.144	0.208
Well	39	21	18
Moderate	98	68	30
Poor	47	32	15

*, P<0.05. PSMD14, proteasome 26S subunit, non-ATPase 14; NSCLC, non-small cell lung cancer; SCC, squamous cell carcinoma.