. 2017 Sep 30;8(49):86747–86768. doi: 10.18632/oncotarget.21421

Table 2. PFT staining positivity and clinicopathological variables.

Variable	Samples	PFT staining positivity (%)	P-value (χ2 test)^a
Normal	6	0
Benign	4	0
Hyperplasia	22	0
Inflammatory	4	0
T (primary tumor) stage
T1-2	44	61.4(27/44)	0.0110^b
T3-4	12	100 (12/12)	0.0110^b
N(regional lymph nodes) stage
N0	48	64.6 (31/48)	0.0901
N1-2	8	100 (8/8)	0.0901
M (distant metastasis) stage
M0	46	63.0 (29/46)	0.0060^b
M1	14	100 (14/14)	0.0060^b
Grade
I-II	16	37.5 (6/16)	0.0012^b
III-V	38	84.2 (32/38)	0.0012^b

^a Statistical comparisons were made between samples of T1-2 with T3-4, N0 with N1-2, M0 with M1, and Grade I-II with Grade III-V.

^b P<0.01.