Table 2.

Relationship between the level of OPN3 mRNA expression and clinical features in patients with LUAD from TCGA data

		OPN3 level
	Total	Low	High	χ2	P‐value
Gender				2.042	0.153
Male	238	126	112
Female	277	164	113
Age (year)				4.662	0.031*
<65	220	111	109
≥65	276	166	110
T staging				0.039	0.843
T1–T2	446	251	195
T3–T4	66	38	28
Nodal staging				6.18	0.013*
N0	331	200	131
N1–N3	172	84	88
M staging				2.172	0.141
M0	484	276	208
M1	26	11	15
TNM				2.497	0.114
I–II	397	232	165
III–IV	110	55	55

^* P < 0.05 (Chi‐square tests).